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/modules/settings/serverless-functions/states/settingsServerlessFunctionCodeEditorOutputParamsState.ts

@@ -0,0 +1,7 @@
+import { createState } from 'twenty-ui';
+
+export const settingsServerlessFunctionCodeEditorOutputParamsState =
+  createState<{ language: string; height: number }>({
+    key: 'settingsServerlessFunctionCodeEditorOutputParamsState',
+    defaultValue: { language: 'plaintext', height: 64 },
+  });

packages/twenty-front/src/modules/settings/serverless-functions/states/settingsServerlessFunctionInputState.ts

@@ -0,0 +1,6 @@
+import { createState } from 'twenty-ui';
+
+export const settingsServerlessFunctionInputState = createState<string>({
+  key: 'settingsServerlessFunctionInputState',
+  defaultValue: '{}',
+});

packages/twenty-front/src/modules/settings/serverless-functions/states/settingsServerlessFunctionOutputState.ts

@@ -0,0 +1,6 @@
+import { createState } from 'twenty-ui';
+
+export const settingsServerlessFunctionOutputState = createState<string>({
+  key: 'settingsServerlessFunctionOutputState',
+  defaultValue: 'Enter an input above then press "run Function"',
+});