v0.1.0

VolumeX 0.1.0: per-app and system-wide volume booster for Windows

- PyQt5 app: mixer with a boost slider per app (up to 300%, 500% unlockable),
  master dial with quick presets, tray quick mixer, global hotkeys, on-screen
  display, automations (remembered levels, rules), settings and first-run setup
- Boost engine process: gain + look-ahead limiter (Distortion Guard), drift-
  corrected capture/render through VB-CABLE by VB-Audio, installed in one click
- Safe by design: only boosted apps are routed, write-ahead journal, everything
  restored on quit, crash or uninstall; no code injection
- Website and user manual (HTML + PDF) in docs/ for GitHub Pages
- Packaging: PyInstaller build, Inno Setup installer, portable zip