feat: add findAll and findUnique resolver for universal objects (#1576)

* wip: refacto and start creating custom resolver

* feat: findMany & findUnique of a custom entity

* feat: wip pagination

* feat: initial metadata migration

* feat: universal findAll with pagination

* fix: clean small stuff in pagination

* fix: test

* fix: miss file

* feat: rename custom into universal

* feat: create metadata schema in default database

---------

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

server/src/utils/snake-case.ts

@@ -0,0 +1,26 @@
+import isObject from 'lodash.isobject';
+import lodashSnakeCase from 'lodash.snakecase';
+import { SnakeCase, SnakeCasedPropertiesDeep } from 'type-fest';
+
+export const snakeCase = <T>(text: T) =>
+  lodashSnakeCase(text as unknown as string) as SnakeCase<T>;
+
+export const snakeCaseDeep = <T>(value: T): SnakeCasedPropertiesDeep<T> => {
+  // Check if it's an array
+  if (Array.isArray(value)) {
+    return value.map(snakeCaseDeep) as SnakeCasedPropertiesDeep<T>;
+  }
+
+  // Check if it's an object
+  if (isObject(value)) {
+    const result: Record<string, any> = {};
+
+    for (const key in value) {
+      result[snakeCase(key)] = snakeCaseDeep(value[key]);
+    }
+
+    return result as SnakeCasedPropertiesDeep<T>;
+  }
+
+  return value as SnakeCasedPropertiesDeep<T>;
+};