Toggle Audio 0.1.0

Initial native release; replaces the PowerShell proof of concept (Switch-Audio.exe, built with ps2exe, about 900 ms per toggle).

Added

• Instant toggle: toggle-audio flips the Windows default playback device between two configured endpoints in milliseconds. Sets the Console and Multimedia roles, plus Communications unless disabled (switch_communications, --comm / --no-comm). Falls back to the other device when the preferred one is unplugged, and reports an error instead of a silent no-op when neither is available.
• Two native x64 executables with a static CRT and no runtime dependencies: toggle-audio.exe (console subsystem, consoleAllocationPolicy = detached, so no console window flashes on Windows 11 24H2 and later) and toggle-audiow.exe (GUI subsystem, never creates a console; for hotkeys on older Windows builds).
• Command-line interface: list (active playback endpoints with id, name and default flags), get (current default device), set <id-or-name> (by endpoint id, exact friendly name or a part of a name that matches one device; an ambiguous name exits with code 4 and lists the matches), settings, --help, --version and --timing (per-phase timings on stderr). Documented exit codes 0 to 4. Unicode-safe output: UTF-16 to the console, UTF-8 when redirected.
• Errors are shown in a message box when there is no console, so a failed hotkey press never fails silently.
• Settings dialog (toggle-audio settings, Start Menu "Toggle Audio Settings"): pick Device 1 and Device 2 from the active playback devices, keep a disconnected device selectable, test the toggle before saving, and copy the program path for Logitech G HUB or any other launcher.
• Per-user configuration in %APPDATA%\toggle-audio\config.json, stored by stable endpoint id and written atomically.
• Per-machine MSI installer (WiX Toolset 7) into C:\Program Files\Toggle Audio\ with a Start Menu shortcut, App Paths registration, an optional PATH entry, in-place upgrades and clean uninstall.
• Reproducible benchmarks under bench/: optimized implementations in C, Rust, C# NativeAOT, Go and Zig plus PowerShell baselines, a shared CLI contract, a hyperfine harness and published results (bench/RESULTS.md, summarized in docs/benchmarks.md).
• THIRD-PARTY-NOTICES.txt with the licenses of the statically linked crates, installed by the MSI and included in the zip.
• Documentation: README with install, hotkey set-up (G HUB and other launchers), command-line and configuration reference, compatibility and troubleshooting notes; docs/benchmarks.md; docs/packaging.md.
• Continuous integration (format, lint, tests, release build with a static C runtime check, benchmark builds, MSI build and validation) and tag-driven release automation with the MSI, a portable zip and SHA256SUMS.txt.

Full Changelog: https://github.com/hotdogee/toggle-audio/commits/v0.1.0