Fix CI: use Clang 19+, update compiler requirements in docs

Fix Clang 18 CI: install libstdc++-14-dev, add vcpkg cache, drop duplicate Windows entry

Fix CI: require C++23-capable compilers, fix Windows mpg123 linking

gitignore

Major refactor: replace external deps with in-house parsers, add local GPU transcription

Fix release workflow: use body_path instead of multiline output

Fix release workflow: use unique EOF marker and update to softprops/action-gh-release

Update README.md to simplify

Update build configuration

Fix Snyk SARIF upload error handling

Fix Snyk security workflow syntax errors

Fix critical security vulnerabilities

Merge pull request #32 from swiftraccoon/feature/cicd-overhaul

Add security suppression comments for test mocks

Fix linker error: make getTempDir() inline