ThemeToggle: allar útgáfur og eldri útgáfur

1.6.0 makes exit codes and theme-refresh behavior match measured reality:
- Exit code 20 (broadcast failure) is now meaningful; it was chronically returned on successful theme changes because internal per-window notifications always failed silently
- Faster switches: app nudges now run before the global broadcast, roughly halving in-process work on busy desktops
- The stubborn-app nudge list is slimmed to notifications that verifiably deliver (Explorer, dialogs, Chromium/Electron family, Firefox)
- /passthru now prints per-stage timing diagnostics
- No CLI syntax changes; scripts keying on exit codes now get a real signal

A switch completes in a few tens of milliseconds even on a busy desktop.

See full changelog at: https://github.com/espensev/ThemeToggle/blob/main/docs/RELEASE_NOTES.md

1.5.5 focuses on direct execution and release quality:
- Installer shortcuts and setup flows now launch ThemeToggle.exe directly
- GUI launches stay silent; /notify remains a backward-compatible no-op
- Release workflow now submits CI-generated WinGet manifests to avoid hash drift
- WinGet metadata and validation were updated for the new packaging flow

Observed toggle duration on test systems remains around 10-15 ms.

See full changelog at: https://github.com/espensev/ThemeToggle/blob/main/docs/RELEASE_NOTES.md

1.5.5 focuses on direct execution and release quality:
- Installer shortcuts and setup flows now launch ThemeToggle.exe directly
- GUI launches stay silent; /notify remains a backward-compatible no-op
- Release workflow now submits CI-generated WinGet manifests to avoid hash drift
- WinGet metadata and validation were updated for the new packaging flow

Observed toggle duration on test systems remains around 10-15 ms.

See full changelog at: https://github.com/espensev/ThemeToggle/blob/main/docs/RELEASE_NOTES.md

Distribution and packaging update:
- NSIS installer with optional shortcuts/startup/scheduled tasks
- Unified release pipeline (dist/build-release.bat)
- WinGet manifest updater (dist/update-winget.ps1)
- Consolidated silent launchers (dist/launchers)
- Documentation refresh for release steps

No runtime behavior changes; performance remains 10-15ms.

See full changelog at: https://github.com/espensev/ThemeToggle/blob/main/docs/RELEASE_NOTES.md

Distribution and packaging update:
- NSIS installer with optional shortcuts/startup/scheduled tasks
- Unified release pipeline (dist/build-release.bat)
- WinGet manifest updater (dist/update-winget.ps1)
- Consolidated silent launchers (dist/launchers)
- Documentation refresh for release steps

No runtime behavior changes; performance remains 10-15ms.

See full changelog at: https://github.com/espensev/ThemeToggle/blob/main/docs/RELEASE_NOTES.md