Package the self-contained Windows x64 publication, register the postit URI scheme, and provide a Start menu shortcut and uninstaller. Document generation and update the changelog.
Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
The esbuild bundles under wwwroot/js and wwwroot/css are now
produced by 'npm run build:js'. Document this in INSTALL.md so
new contributors know to run 'npm install' before 'make install'.
