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-front/src/utils/file/__tests__/getFileAbsoluteURI.test.ts

@@ -0,0 +1,10 @@
+import { getFileAbsoluteURI } from '../getFileAbsoluteURI';
+import { REACT_APP_SERVER_BASE_URL } from '~/config';
+
+describe('getFileAbsoluteURI', () => {
+  test('should return absolute uri', () => {
+    expect(getFileAbsoluteURI('foo')).toEqual(
+      `${REACT_APP_SERVER_BASE_URL}/files/foo`,
+    );
+  });
+});

packages/twenty-front/src/utils/file/getFileAbsoluteURI.ts

@@ -0,0 +1,5 @@
+import { REACT_APP_SERVER_BASE_URL } from '~/config';
+
+export const getFileAbsoluteURI = (fileUrl?: string) => {
+  return `${REACT_APP_SERVER_BASE_URL}/files/${fileUrl}`;
+};