Add Northflank connection support

- Introduced Northflank as a new app connection option, including API token authentication.
- Implemented connection schemas, validation, and service functions for Northflank.
- Updated API documentation to include Northflank endpoints and integration instructions.
- Added frontend components for creating and managing Northflank connections.

frontend/src/pages/organization/AppConnections/AppConnectionsPage/components/AppConnectionForm/AppConnectionForm.tsx

@@ -36,6 +36,7 @@ import { LdapConnectionForm } from "./LdapConnectionForm";
 import { MsSqlConnectionForm } from "./MsSqlConnectionForm";
 import { MySqlConnectionForm } from "./MySqlConnectionForm";
 import { NetlifyConnectionForm } from "./NetlifyConnectionForm";
+import { NorthflankConnectionForm } from "./NorthflankConnectionForm";
 import { OCIConnectionForm } from "./OCIConnectionForm";
 import { OktaConnectionForm } from "./OktaConnectionForm";
 import { OracleDBConnectionForm } from "./OracleDBConnectionForm";
@@ -169,6 +170,8 @@ const CreateForm = ({ app, onComplete, projectId }: CreateFormProps) => {
       return <DigitalOceanConnectionForm onSubmit={onSubmit} />;
     case AppConnection.Netlify:
       return <NetlifyConnectionForm onSubmit={onSubmit} />;
+    case AppConnection.Northflank:
+      return <NorthflankConnectionForm onSubmit={onSubmit} />;
     case AppConnection.Okta:
       return <OktaConnectionForm onSubmit={onSubmit} />;
     case AppConnection.Redis:
@@ -326,6 +329,8 @@ const UpdateForm = ({ appConnection, onComplete }: UpdateFormProps) => {
       return <SupabaseConnectionForm onSubmit={onSubmit} appConnection={appConnection} />;
     case AppConnection.DigitalOcean:
       return <DigitalOceanConnectionForm onSubmit={onSubmit} appConnection={appConnection} />;
+    case AppConnection.Northflank:
+      return <NorthflankConnectionForm onSubmit={onSubmit} appConnection={appConnection} />;
     case AppConnection.Okta:
       return <OktaConnectionForm onSubmit={onSubmit} appConnection={appConnection} />;
     case AppConnection.Redis:

frontend/src/pages/organization/AppConnections/AppConnectionsPage/components/AppConnectionForm/NorthflankConnectionForm.tsx

@@ -0,0 +1,136 @@
+import { Controller, FormProvider, useForm } from "react-hook-form";
+import { zodResolver } from "@hookform/resolvers/zod";
+import { z } from "zod";
+
+import {
+  Button,
+  FormControl,
+  ModalClose,
+  SecretInput,
+  Select,
+  SelectItem
+} from "@app/components/v2";
+import { APP_CONNECTION_MAP, getAppConnectionMethodDetails } from "@app/helpers/appConnections";
+import { AppConnection } from "@app/hooks/api/appConnections/enums";
+import {
+  TNorthflankConnection,
+  NorthflankConnectionMethod
+} from "@app/hooks/api/appConnections/types/northflank-connection";
+
+import {
+  genericAppConnectionFieldsSchema,
+  GenericAppConnectionsFields
+} from "./GenericAppConnectionFields";
+
+type Props = {
+  appConnection?: TNorthflankConnection;
+  onSubmit: (formData: FormData) => void;
+};
+
+const rootSchema = genericAppConnectionFieldsSchema.extend({
+  app: z.literal(AppConnection.Northflank)
+});
+
+const formSchema = z.discriminatedUnion("method", [
+  rootSchema.extend({
+    method: z.literal(NorthflankConnectionMethod.ApiToken),
+    credentials: z.object({
+      apiToken: z.string().trim().min(1, "API Token required")
+    })
+  })
+]);
+
+type FormData = z.infer<typeof formSchema>;
+
+export const NorthflankConnectionForm = ({ appConnection, onSubmit }: Props) => {
+  const isUpdate = Boolean(appConnection);
+
+  const form = useForm<FormData>({
+    resolver: zodResolver(formSchema),
+    defaultValues: appConnection ?? {
+      app: AppConnection.Northflank,
+      method: NorthflankConnectionMethod.ApiToken
+    }
+  });
+
+  const {
+    handleSubmit,
+    control,
+    formState: { isSubmitting, isDirty }
+  } = form;
+
+  return (
+    <FormProvider {...form}>
+      <form onSubmit={handleSubmit(onSubmit)}>
+        {!isUpdate && <GenericAppConnectionsFields />}
+        <Controller
+          name="method"
+          control={control}
+          render={({ field: { value, onChange }, fieldState: { error } }) => (
+            <FormControl
+              tooltipText={`The method you would like to use to connect with ${
+                APP_CONNECTION_MAP[AppConnection.Northflank].name
+              }. This field cannot be changed after creation.`}
+              errorText={error?.message}
+              isError={Boolean(error?.message)}
+              label="Method"
+            >
+              <Select
+                isDisabled={isUpdate}
+                value={value}
+                onValueChange={(val) => onChange(val)}
+                className="w-full border border-mineshaft-500"
+                position="popper"
+                dropdownContainerClassName="max-w-none"
+              >
+                {Object.values(NorthflankConnectionMethod).map((method) => {
+                  return (
+                    <SelectItem value={method} key={method}>
+                      {getAppConnectionMethodDetails(method).name}{" "}
+                    </SelectItem>
+                  );
+                })}
+              </Select>
+            </FormControl>
+          )}
+        />
+        <Controller
+          name="credentials.apiToken"
+          control={control}
+          shouldUnregister
+          render={({ field: { value, onChange }, fieldState: { error } }) => (
+            <FormControl
+              errorText={error?.message}
+              isError={Boolean(error?.message)}
+              label="API Token"
+            >
+              <SecretInput
+                containerClassName="text-gray-400 group-focus-within:border-primary-400/50! border border-mineshaft-500 bg-mineshaft-900 px-2.5 py-1.5"
+                value={value}
+                onChange={(e) => onChange(e.target.value)}
+              />
+            </FormControl>
+          )}
+        />
+        <div className="mt-8 flex items-center">
+          <Button
+            className="mr-4"
+            size="sm"
+            type="submit"
+            colorSchema="secondary"
+            isLoading={isSubmitting}
+            isDisabled={isSubmitting || !isDirty}
+          >
+            {isUpdate ? "Update Credentials" : "Connect to Northflank"}
+          </Button>
+          <ModalClose asChild>
+            <Button colorSchema="secondary" variant="plain">
+              Cancel
+            </Button>
+          </ModalClose>
+        </div>
+      </form>
+    </FormProvider>
+  );
+};
+

frontend/src/pages/organization/AppConnections/AppConnectionsPage/components/AppConnectionList.tsx

@@ -72,6 +72,7 @@ export const AppConnectionsSelect = ({ onSelect, projectType }: Props) => {
 
           return (
             <button
+              key={option.app}
               type="button"
               onClick={() =>
                 enterprise && !subscription.enterpriseAppConnections