feat: Setup CI with GitHub Actions

[timothyfroehlich]

Description:
To ensure code quality and prevent regressions, we need to establish a Continuous Integration (CI) pipeline. This pipeline should automatically run on every push and pull request to the main branch.

Acceptance Criteria:

• A GitHub Actions workflow is created at .github/workflows/ci.yml.
• The workflow is triggered on push and pull_request events for the main branch.
• The workflow executes the following steps:
  1. Checks out the code.
  2. Installs Node.js and dependencies (npm install).
  3. Runs the linter (npm run lint).
  4. Runs the build command (npm run build) to ensure the project compiles without errors.
  5. Runs the tests (npm run test).
• The PR is blocked from merging if any of these steps fail.

Technical Notes:

• The project's package.json already contains the necessary scripts: lint, build, and test.
• A standard Node.js workflow template can be used as a starting point.
• No secrets are required for this initial setup.

Depends On: N/A