[AUDIT] Run knip over twenty-server (#21159)

# Introduction
Run [knip](https://knip.dev/) over twenty-server
Used config:
```json
{
  "$schema": "https://unpkg.com/knip@5/schema.json",
  "workspaces": {
    "packages/twenty-server": {
      "entry": [
        "src/main.ts",
        "src/command/command.ts",
        "src/queue-worker/queue-worker.ts",
        "src/database/scripts/setup-db.ts",
        "src/database/scripts/truncate-db.ts",
        "src/database/clickHouse/migrations/run-migrations.ts",
        "src/database/clickHouse/seeds/run-seeds.ts",
        "src/instrument.ts",
        "lingui.config.ts",
        "test/integration/graphql/codegen/index.ts",
        "test/integration/utils/setup-test.ts",
        "test/integration/utils/teardown-test.ts",
        "scripts/**/*.ts",
        "**/*.spec.ts",
        "**/*.integration-spec.ts"
      ],
      "project": ["src/**/*.ts", "test/**/*.ts", "scripts/**/*.ts"],
      "ignore": [
        "src/database/typeorm/**/migrations/**",
        "src/database/typeorm/**/*.entity.ts",
        "**/*.workspace-entity.ts",
        "**/logic-function-resource/constants/seed-project/**"
      ],
      "ignoreDependencies": ["@types/psl", "@types/aws-lambda"],
      "ignoreBinaries": ["nest", "lingui", "typeorm"]
    }
  }
}
```

packages/twenty-server/src/engine/core-modules/application/application-oauth-provider/refresh/types/app-oauth-tokens.type.ts

@@ -1,8 +0,0 @@
-// Refresh result returned by the app OAuth driver. Mirrors
-// `ConnectedAccountTokens` from the central refresh manager but redeclared
-// here so this engine-side driver has zero dependency on `modules/`.
-
-export type AppOAuthTokens = {
-  accessToken: string;
-  refreshToken: string | null;
-};

packages/twenty-server/src/engine/core-modules/application/constants/application-manifest-metadata-names.constant.ts

@@ -1,25 +0,0 @@
-import { type AllMetadataName } from 'twenty-shared/metadata';
-
-export const APPLICATION_MANIFEST_METADATA_NAMES = [
-  'objectMetadata',
-  'fieldMetadata',
-  'logicFunction',
-  'frontComponent',
-  'role',
-  'skill',
-  'agent',
-  'view',
-  'viewField',
-  'viewFieldGroup',
-  'viewFilter',
-  'viewFilterGroup',
-  'viewGroup',
-  'navigationMenuItem',
-  'pageLayout',
-  'pageLayoutTab',
-  'pageLayoutWidget',
-  'commandMenuItem',
-] as const satisfies AllMetadataName[];
-
-export type ApplicationManifestMetadataName =
-  (typeof APPLICATION_MANIFEST_METADATA_NAMES)[number];