Serverless function UI (#6388)

https://www.figma.com/design/xt8O9mFeLl46C5InWwoMrN/Twenty?node-id=36235-120877

Did not do the file manager part. A Function is defined using one unique
file at the moment

Feature protected by featureFlag `IS_FUNCTION_SETTINGS_ENABLED`

## Demo


https://github.com/user-attachments/assets/0acb8291-47b4-4521-a6fa-a88b9198609b

packages/twenty-server/src/database/typeorm-seeds/core/feature-flags.ts

@@ -50,6 +50,11 @@ export const seedFeatureFlags = async (
         workspaceId: workspaceId,
         value: true,
       },
+      {
+        key: FeatureFlagKeys.IsFunctionSettingsEnabled,
+        workspaceId: workspaceId,
+        value: true,
+      },
       {
         key: FeatureFlagKeys.IsWorkflowEnabled,
         workspaceId: workspaceId,

packages/twenty-server/src/database/typeorm/metadata/migrations/1721309629608-addRuntimeColumnToServerlessFunction.ts

@@ -0,0 +1,25 @@
+import { MigrationInterface, QueryRunner } from 'typeorm';
+
+export class AddRuntimeColumnToServerlessFunction1721309629608
+  implements MigrationInterface
+{
+  name = 'AddRuntimeColumnToServerlessFunction1721309629608';
+
+  public async up(queryRunner: QueryRunner): Promise<void> {
+    await queryRunner.query(
+      `ALTER TABLE "metadata"."serverlessFunction" ADD "runtime" character varying NOT NULL DEFAULT 'nodejs18.x'`,
+    );
+    await queryRunner.query(
+      `ALTER TABLE "metadata"."serverlessFunction" ADD "description" character varying`,
+    );
+    await queryRunner.query(
+      `ALTER TABLE "metadata"."serverlessFunction" ADD "sourceCodeFullPath" character varying NOT NULL`,
+    );
+  }
+
+  public async down(queryRunner: QueryRunner): Promise<void> {
+    await queryRunner.query(
+      `ALTER TABLE "metadata"."serverlessFunction" DROP COLUMN "runtime"`,
+    );
+  }
+}