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-ui/src/display/icon/components/TablerIcons.ts

@@ -84,6 +84,7 @@ export {
   IconFilter,
   IconFilterOff,
   IconFocusCentered,
+  IconFunction,
   IconForbid,
   IconGripVertical,
   IconH1,
@@ -127,6 +128,7 @@ export {
   IconPhone,
   IconPhoto,
   IconPilcrow,
+  IconPlayerPlay,
   IconPlug,
   IconPlus,
   IconPresentation,
@@ -153,6 +155,7 @@ export {
   IconTags,
   IconTarget,
   IconTargetArrow,
+  IconTestPipe,
   IconTextSize,
   IconTimelineEvent,
   IconTrash,