feat: Digital Ocean App connection and App Platform secret sync (#4203)

* fix: save wip

* feat: final impl

* feat: docs

* Update backend/src/services/app-connection/digital-ocean/digital-ocean-connection-service.ts

Co-authored-by: greptile-apps[bot] <165735046+greptile-apps[bot]@users.noreply.github.com>

* chore: remove empty conflict files

* Update backend/src/server/routes/v1/app-connection-routers/app-connection-router.ts

Co-authored-by: greptile-apps[bot] <165735046+greptile-apps[bot]@users.noreply.github.com>

* Update frontend/src/components/secret-syncs/forms/schemas/digital-ocean-app-platform-sync-destination-schema.ts

Co-authored-by: greptile-apps[bot] <165735046+greptile-apps[bot]@users.noreply.github.com>

* Update frontend/src/components/secret-syncs/forms/schemas/digital-ocean-app-platform-sync-destination-schema.ts

Co-authored-by: greptile-apps[bot] <165735046+greptile-apps[bot]@users.noreply.github.com>

* Update frontend/src/components/secret-syncs/forms/SecretSyncDestinationFields/DigitalOceanAppPlatformSyncFields.tsx

Co-authored-by: greptile-apps[bot] <165735046+greptile-apps[bot]@users.noreply.github.com>

* Update backend/src/services/secret-sync/digital-ocean-app-platform/digital-ocean-app-platform-sync-schemas.ts

Co-authored-by: greptile-apps[bot] <165735046+greptile-apps[bot]@users.noreply.github.com>

* fix: lint

* fix: api client

* fix: lint and types

* fix: typecheck lint

* fix: docs

* fix: docs

* fix: linting

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docs/api-reference/endpoints/secret-syncs/digital-ocean-app-platform/sync-secrets.mdx

@@ -0,0 +1,4 @@
+---
+title: "Sync Secrets"
+openapi: "POST /api/v1/secret-syncs/digital-ocean-app-platform/{syncId}/sync-secrets"
+---