feature: add suport for project scoped app connections

docs/integrations/app-connections/mysql.mdx

@@ -52,7 +52,7 @@ Infisical supports connecting to MySQL using a database role.
 
 <Tabs>
     <Tab title="Infisical UI">
-        1. Navigate to the App Connections tab on the Organization Settings page.
+        1. Navigate to the **App Connections** page in the desired project.
         ![App Connections Tab](/images/app-connections/general/add-connection.png)
 
         2. Select the **MySQL Connection** option.
@@ -88,6 +88,7 @@ Infisical supports connecting to MySQL using a database role.
             "name": "my-mysql-connection",
             "method": "username-and-password",
             "isPlatformManagedCredentials": true,
+            "projectId": "7ffbb072-2575-495a-b5b0-127f88caef78",
             "credentials": {
                 "host": "123.4.5.6",
                 "port": 3306,
@@ -107,6 +108,7 @@ Infisical supports connecting to MySQL using a database role.
             "appConnection": {
                 "id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
                 "name": "my-mysql-connection",
+                "projectId": "7ffbb072-2575-495a-b5b0-127f88caef78",
                 "version": 1,
                 "orgId": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
                 "createdAt": "2023-11-07T05:31:56Z",