Add a custom rule to prevent colors from being hardcoded outside of theme (#288)

* Add a custom rule to prevent colors from being hardcoded in ESLint

* Refactor colors

* Create packages folder and fix colors

* Remove external dependency for css alphabetical order linting

* Fix install with yarn

---------

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

packages/twenty-cli/__tests__/config.ts

@@ -0,0 +1,8 @@
+import { execShell } from '../src/config';
+
+export {};
+
+test('execShell runs a shell command', async () => {
+  let response = await execShell('echo "hello"');
+  expect(response).toEqual('hello\n');
+});