Fix issue #44: Add CI workflow and update Husky configuration

[bhouston]

Fix Issue #44: Add CI Workflow and Update Husky Configuration

This PR implements recommendations 2 and 3 from issue #44:

Changes:

1. Added CI Workflow:

   • Created a new GitHub Actions workflow file (.github/workflows/ci.yml)
   • Configured to run on all pushes and PRs to main
   • Performs linting, type checking, and build validation
   • Based on the workflow from mycoder-websites repository

2. Fixed Husky Configuration:

   • Updated pre-commit hook to properly run pre-commit-check
   • Added pre-push hook with the same validation
   • Made both hooks executable
   • Updated lint-staged configuration in package.json

3. Added .nvmrc file:

   • Created .nvmrc with Node.js version 18 to ensure consistent Node.js versions

These changes will help prevent broken builds from being committed or pushed, even if developers bypass the pre-commit hooks locally.

Closes #44