refactor(editor): Refactor utils files and mixins (#4654)

* ✨ Added `utils` module. Moved `canvasHelpers` and old `utils.ts` file to it
* ✨ Moved rest of utils and helpers
* ⚡ Fixing sytax errors
* 🔨 Refactoring new utils files
* 🔨 Organizing imports, adding comments and a bit more refactoring
* ✔️ Fixing tests
* 🔨 Moving mixins to `src`

packages/editor-ui/src/components/CredentialsSelectModal.vue

@@ -59,7 +59,7 @@ import mixins from 'vue-typed-mixins';
 
 import Modal from './Modal.vue';
 import { CREDENTIAL_SELECT_MODAL_KEY } from '../constants';
-import { externalHooks } from '@/components/mixins/externalHooks';
+import { externalHooks } from '@/mixins/externalHooks';
 import { mapStores } from 'pinia';
 import { useUIStore } from '@/stores/ui';
 import { useWorkflowsStore } from '@/stores/workflows';