fix: multiple twenty orm issues & show an example of use (#5439)

This PR is fixing some issues and adding enhancement in TwentyORM:

- [x] Composite fields in nested relations are not formatted properly
- [x] Passing operators like `Any` in `where` condition is breaking the
query
- [x] Ability to auto load workspace-entities based on a regex path

I've also introduced an example of use for `CalendarEventService`:


https://github.com/twentyhq/twenty/pull/5439/files#diff-3a7dffc0dea57345d10e70c648e911f98fe237248bcea124dafa9c8deb1db748R15

packages/twenty-server/src/engine/twenty-orm/utils/split-classes-and-strings.util.ts

@@ -0,0 +1,8 @@
+export const splitClassesAndStrings = <T>(
+  classesAndStrings: (string | T)[],
+): [T[], string[]] => {
+  return [
+    classesAndStrings.filter((cls): cls is T => typeof cls !== 'string'),
+    classesAndStrings.filter((str): str is string => typeof str === 'string'),
+  ];
+};