[POC] add graphql query runner (#6747)

## Context
The goal is to replace pg_graphql with our own ORM wrapper (TwentyORM).
This PR tries to add some parsing logic to convert graphql requests to
send to the ORM to replace pg_graphql implementation.

---------

Co-authored-by: Charles Bochet <charles@twenty.com>

packages/twenty-server/src/utils/is-plain-object.ts

@@ -1,9 +1,5 @@
-export const isPlainObject = <T>(value: T): boolean => {
-  if (Object.prototype.toString.call(value) !== '[object Object]') {
-    return false;
-  }
-
-  const prototype = Object.getPrototypeOf(value);
-
-  return prototype === null || prototype === Object.prototype;
+export const isPlainObject = (
+  input: unknown,
+): input is Record<string, unknown> => {
+  return typeof input === 'object' && input !== null && !Array.isArray(input);
 };