Merge pull request #4 from PavanKumarR20/develop

docs: fix screenshot sizes to uniform 200px width

docs: add app screenshots (jpeg)

docs: add screenshots section to README

docs: add README at repository root

docs: replace default README with portfolio-quality documentation

Merge pull request #3 from PavanKumarR20/chore/security-cleanup

chore: remove unnecessary, dead-code, and credential-leaking files

updated test files

fix: resolve all compile errors

chore: exclude google-services.json and firebase_options.dart from tracking

fixed pomodoro break issues

fixes

added alarm package for pomodoro

added notifications and fixed breaks