[Bug] Select options names can't start with a number (#7079)

This PR was created by [GitStart](https://gitstart.com/) to address the
requirements from this ticket:
[TWNTY-6980](https://clients.gitstart.com/twenty/5449/tickets/TWNTY-6980).
This ticket was imported from:
[TWNTY-6980](https://github.com/twentyhq/twenty/issues/6980)

 --- 

### Description

- **fix**: added a transformation step that prefixes the newly added
option with an underscore before the Graphql enum is generated so it
saves successfully and passes the default GraphQL validation.

### Demo

- <https://www.loom.com/share/feda2198ed8b4e558f96520a0d051725>

### Refs

#6980

Fixes #6980

Co-authored-by: gitstart-twenty <gitstart-twenty@users.noreply.github.com>
Co-authored-by: Weiko <corentin@twenty.com>

packages/twenty-server/src/engine/utils/transform-enum-value.ts

@@ -0,0 +1,14 @@
+import { FieldMetadataDefaultOption } from 'src/engine/metadata-modules/field-metadata/dtos/options.input';
+
+export function transformEnumValue(options?: FieldMetadataDefaultOption[]) {
+  return options?.map((option) => {
+    if (/^\d/.test(option.value)) {
+      return {
+        ...option,
+        value: `_${option.value}`,
+      };
+    }
+
+    return option;
+  });
+}