Add testing for the main page using Playwright

[gilkeidar]

Task Description: Add end-to-end tests using Playwright (new framework) for the main page.

Suggested Workflow:

• [ ] Create a new branch that is an offshoot of dev called testing-main-page
• [ ] Add tests to main_page.spec.js in the tests/e2e/main_page directory
• [ ] Once you're done, create a pull request back to dev
• [ ] Resolve all merge conflicts and merge to dev

See this to get started.

[gilkeidar]

Once pushing to main, fix URL to be of the deployed GitHub page so that the automatically generated CI/CD workflow of E2E tests can run correctly!

[gilkeidar]

Duplicate of #113