feat: enhance Playwright testing setup with E2E tests, new skills, and improved documentation

- Added E2E test setup in `auth_api.py` with `/e2e-seed` endpoint for database reset and test user creation.
- Integrated Playwright for end-to-end testing in the frontend with necessary dependencies in `package.json` and `package-lock.json`.
- Created Playwright configuration in `playwright.config.ts` to manage test execution and server setup.
- Developed new skills for Playwright best practices, visual regression, smoke test generation, and self-healing tests.
- Implemented new test cases for chore creation in `chores-create.smoke.spec.ts` and `chores-create.spec.ts`.
- Added page object models for `ChildEditPage` and `LandingPage` to streamline test interactions.
- Updated `.gitignore` to exclude Playwright reports and test results.
- Enhanced documentation in `copilot-instructions.md` for testing and E2E setup.

.github/skills/vue-frontend/SKILL.md

@@ -0,0 +1,21 @@
+---
+name: vue-frontend
+description: Starts the Vue development server for the frontend application.
+disable-model-invocation: true
+---
+
+# Instructions
+
+Use this skill when the user wants to "start the frontend," "run vue," or "launch the dev server."
+
+1. **Verify Directory:** Navigate to `./frontend/vue-app`.
+   - _Self-Correction:_ If the directory doesn't exist, search the workspace for `package.json` files and ask for clarification.
+
+2. **Check Dependencies:** - Before running, check if `node_modules` exists in `./frontend/vue-app`.
+   - If missing, ask the user: "Should I run `npm install` first?"
+
+3. **Execution:** - Run the command: `npm run dev`
+   - This script is configured in `package.json` to start the Vite/Vue dev server.
+
+4. **Success Criteria:** - Monitor the terminal output for a local URL (typically `http://localhost:5173` or similar).
+   - Once the server is "Ready," notify the user.