Add Discord-native hybrid front-end for Jarvis (bot + bridge)

Transform isair/jarvis into a Discord-controlled voice assistant running on
the Ubuntu VNC desktop, keeping the mature ~39k-line Python brain intact.

- bot/ (Node + bun, discord.js): /자비스 slash commands (ephemeral),
  voice channel join + voice receive/playback, pluggable VNC screen broadcast
  (selfbot live / noVNC / screenshot)
- bridge/ (Python, Flask): wraps jarvis STT + run_reply_engine + Piper TTS
  behind a thin localhost HTTP API
- .env.example, scripts/ (start_bridge/start_bot/dev), README rewrite,
  docs/language-comparison.md and docs/vnc-xfce-setup.md

Language decision: hybrid (Python brain + Node/bun Discord layer) because
Discord blocks bot video; native screen broadcast only works via a Node
selfbot library.

scripts/run_windows.ps1

@@ -0,0 +1,63 @@
+Param()
+
+$ErrorActionPreference = 'Stop'
+
+function Write-Info($msg) { Write-Host "[jarvis] $msg" }
+
+# Repo root
+$SCRIPT_DIR = Split-Path -Parent $MyInvocation.MyCommand.Path
+$REPO_ROOT = Resolve-Path (Join-Path $SCRIPT_DIR '..')
+Set-Location $REPO_ROOT
+
+# Helper to set env vars for the current process
+$env:PYTHONPATH = Join-Path $REPO_ROOT 'src'
+if (-not $env:JARVIS_VOICE_DEBUG) { $env:JARVIS_VOICE_DEBUG = '0' }
+
+# Prefer micromamba for pre-built dependencies (webrtcvad, av, etc.)
+$micromamba = Get-Command micromamba -ErrorAction SilentlyContinue
+if ($micromamba) {
+  $envPrefix = Join-Path $REPO_ROOT '.mamba_env'
+  Write-Info "Using Micromamba environment at '$envPrefix' (avoids compilation issues)"
+
+  if (-not (Test-Path $envPrefix)) {
+    Write-Info 'Creating environment (python 3.12)...'
+    micromamba create -y -p $envPrefix python=3.12 -c conda-forge
+  }
+
+  Write-Info 'Installing PyAV (FFmpeg bindings) from conda-forge...'
+  micromamba install -y -p $envPrefix -c conda-forge av
+
+  Write-Info 'Installing Python requirements with pip...'
+  micromamba run -p $envPrefix pip install -r requirements.txt
+
+  # Prefer launching python.exe directly so Ctrl+C propagates to the child on Windows
+  $envPython = Join-Path $envPrefix 'python.exe'
+  if (Test-Path $envPython) {
+    Write-Info 'Starting daemon...'
+    & $envPython -m jarvis.daemon
+    exit $LASTEXITCODE
+  } else {
+    # Fallback to micromamba run if python.exe is not found for some reason
+    Write-Info 'Starting daemon (fallback via micromamba run)...'
+    micromamba run -p $envPrefix python -m jarvis.daemon
+    exit $LASTEXITCODE
+  }
+}
+
+# Fallback: venv + pip (may require Visual C++ Build Tools for compilation)
+$venvPath = Join-Path $REPO_ROOT '.venv'
+$venvPython = Join-Path $venvPath 'Scripts/python.exe'
+Write-Info "Micromamba not found, using regular Python (may need Visual C++ Build Tools for native deps)"
+
+if (-not (Test-Path $venvPython)) {
+  Write-Info 'Creating virtual environment (.venv)...'
+  python -m venv $venvPath
+}
+
+Write-Info 'Installing Python requirements with pip...'
+& $venvPython -m pip install -r requirements.txt
+
+Write-Info 'Starting daemon...'
+& $venvPython -m jarvis.daemon
+
+