Enhance testing and integration for checkbox-list custom field

- Updated Gitea workflow to trigger on pushes to the master branch and refined job configurations for testing and E2E processes.
- Added Jest and Playwright configurations for integration and E2E testing.
- Introduced new checkbox-item API with corresponding controller, service, and routes.
- Created integration tests for the checkbox-list functionality, ensuring proper handling of required fields and default values.
- Updated package.json and package-lock.json to include necessary dependencies for testing.

playground/src/api/checkbox-item/content-types/checkbox-item/schema.json

@@ -0,0 +1,51 @@
+{
+  "kind": "collectionType",
+  "collectionName": "checkbox_items",
+  "info": {
+    "singularName": "checkbox-item",
+    "pluralName": "checkbox-items",
+    "displayName": "Checkbox Item",
+    "description": "Content type for checkbox list integration tests"
+  },
+  "options": {
+    "draftAndPublish": false
+  },
+  "pluginOptions": {},
+  "attributes": {
+    "title": {
+      "type": "string",
+      "required": true
+    },
+    "choices": {
+      "type": "customField",
+      "customField": "plugin::checkbox-list.checkbox-list",
+      "options": {
+        "enum": ["alpha", "beta", "gamma"]
+      }
+    },
+    "choicesRequired": {
+      "type": "customField",
+      "customField": "plugin::checkbox-list.checkbox-list",
+      "options": {
+        "enum": ["alpha", "beta"]
+      },
+      "required": true
+    },
+    "choicesPrivate": {
+      "type": "customField",
+      "customField": "plugin::checkbox-list.checkbox-list",
+      "options": {
+        "enum": ["secret", "top-secret"]
+      },
+      "private": true
+    },
+    "choicesDefault": {
+      "type": "customField",
+      "customField": "plugin::checkbox-list.checkbox-list",
+      "options": {
+        "enum": ["defaultA", "defaultB"]
+      },
+      "default": ["defaultA"]
+    }
+  }
+}

playground/src/api/checkbox-item/controllers/checkbox-item.ts

@@ -0,0 +1,7 @@
+/**
+ * checkbox-item controller
+ */
+
+import { factories } from '@strapi/strapi';
+
+export default factories.createCoreController('api::checkbox-item.checkbox-item');

playground/src/api/checkbox-item/routes/checkbox-item.ts

@@ -0,0 +1,7 @@
+/**
+ * checkbox-item router
+ */
+
+import { factories } from '@strapi/strapi';
+
+export default factories.createCoreRouter('api::checkbox-item.checkbox-item');

playground/src/api/checkbox-item/services/checkbox-item.ts

@@ -0,0 +1,7 @@
+/**
+ * checkbox-item service
+ */
+
+import { factories } from '@strapi/strapi';
+
+export default factories.createCoreService('api::checkbox-item.checkbox-item');