feat(commands): add PC control packs — volume, apps, file_search, output_device

All four packs are pure Lua (sandbox=full) and call out to PowerShell helpers
where COM / native APIs are needed. No new Rust code, no rebuild required:
post_build.py --sync copies them under target/{debug,release}/resources/.

volume/
  - volume_up / volume_down: 5x VK_VOLUME_UP|DOWN via keybd_event
  - volume_mute: VK_VOLUME_MUTE
  - volume_max: 50x VK_VOLUME_UP (system clamps)
  Helper _volume_helper.ps1 P/Invokes user32!keybd_event.

apps/
  - open_browser  : start "" https://www.google.com (uses system default browser)
  - open_notepad  : notepad.exe
  - open_calculator: calc.exe
  - open_explorer : explorer.exe
  - open_terminal : wt.exe, falls back to powershell.exe
  - open_settings : ms-settings: protocol
  - open_task_manager: taskmgr.exe
  - lock_screen   : rundll32 user32.dll,LockWorkStation
  - screenshot    : System.Drawing capture to ~/Pictures/jarvis_screenshot_*.png

file_search/
  - find file <query> : recursive Get-ChildItem in Desktop/Documents/Downloads
    (depth 3, top 5 matches). Strips Russian/English/Ukrainian trigger
    prefixes from the recognized phrase, then opens explorer /select on the
    first hit and notifies with the total count.

output_device/
  - list_output_devices : enumerates active render endpoints via
    IMMDeviceEnumerator and notifies friendly names with indices
  - next_output_device  : cycles the system default render device via the
    undocumented IPolicyConfig::SetDefaultEndpoint (eConsole/Multimedia/
    Communications). Tested locally — listed 7 devices, current correctly
    identified at index 5.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

resources/commands/apps/command.toml

@@ -0,0 +1,230 @@
+[[commands]]
+id = "open_browser"
+type = "lua"
+script = "open_browser.lua"
+sandbox = "full"
+timeout = 5000
+
+[commands.phrases]
+ru = [
+    "открой браузер",
+    "запусти браузер",
+    "открой хром",
+    "запусти хром",
+    "включи браузер",
+    "браузер открой",
+    "нужен браузер",
+]
+en = [
+    "open browser",
+    "launch browser",
+    "open chrome",
+    "launch chrome",
+    "start browser",
+    "i need browser",
+]
+ua = [
+    "відкрий браузер",
+    "запусти браузер",
+    "відкрий хром",
+    "запусти хром",
+    "увімкни браузер",
+]
+
+
+[[commands]]
+id = "open_notepad"
+type = "lua"
+script = "open_notepad.lua"
+sandbox = "full"
+timeout = 5000
+
+[commands.phrases]
+ru = [
+    "открой блокнот",
+    "запусти блокнот",
+    "открой нотепад",
+]
+en = [
+    "open notepad",
+    "launch notepad",
+]
+ua = [
+    "відкрий блокнот",
+    "запусти блокнот",
+]
+
+
+[[commands]]
+id = "open_calculator"
+type = "lua"
+script = "open_calculator.lua"
+sandbox = "full"
+timeout = 5000
+
+[commands.phrases]
+ru = [
+    "открой калькулятор",
+    "запусти калькулятор",
+    "нужен калькулятор",
+]
+en = [
+    "open calculator",
+    "launch calculator",
+    "calculator please",
+]
+ua = [
+    "відкрий калькулятор",
+    "запусти калькулятор",
+]
+
+
+[[commands]]
+id = "open_explorer"
+type = "lua"
+script = "open_explorer.lua"
+sandbox = "full"
+timeout = 5000
+
+[commands.phrases]
+ru = [
+    "открой проводник",
+    "открой папку",
+    "запусти проводник",
+    "открой файлы",
+]
+en = [
+    "open explorer",
+    "open file explorer",
+    "open files",
+    "open folder",
+]
+ua = [
+    "відкрий провідник",
+    "відкрий папку",
+]
+
+
+[[commands]]
+id = "open_terminal"
+type = "lua"
+script = "open_terminal.lua"
+sandbox = "full"
+timeout = 5000
+
+[commands.phrases]
+ru = [
+    "открой терминал",
+    "запусти терминал",
+    "открой консоль",
+    "запусти консоль",
+    "открой повершелл",
+]
+en = [
+    "open terminal",
+    "open powershell",
+    "open console",
+    "launch terminal",
+]
+ua = [
+    "відкрий термінал",
+    "відкрий консоль",
+]
+
+
+[[commands]]
+id = "open_settings"
+type = "lua"
+script = "open_settings.lua"
+sandbox = "full"
+timeout = 5000
+
+[commands.phrases]
+ru = [
+    "открой настройки",
+    "открой параметры",
+    "запусти настройки",
+    "открой настройки виндоус",
+]
+en = [
+    "open settings",
+    "launch settings",
+    "windows settings",
+]
+ua = [
+    "відкрий налаштування",
+    "відкрий параметри",
+]
+
+
+[[commands]]
+id = "open_task_manager"
+type = "lua"
+script = "open_task_manager.lua"
+sandbox = "full"
+timeout = 5000
+
+[commands.phrases]
+ru = [
+    "открой диспетчер задач",
+    "запусти диспетчер задач",
+    "диспетчер задач",
+]
+en = [
+    "open task manager",
+    "launch task manager",
+    "task manager",
+]
+ua = [
+    "відкрий диспетчер задач",
+    "диспетчер задач",
+]
+
+
+[[commands]]
+id = "lock_screen"
+type = "lua"
+script = "lock_screen.lua"
+sandbox = "full"
+timeout = 3000
+
+[commands.phrases]
+ru = [
+    "заблокируй компьютер",
+    "заблокируй экран",
+    "блокировка экрана",
+    "залочь",
+]
+en = [
+    "lock screen",
+    "lock the computer",
+    "lock pc",
+]
+ua = [
+    "заблокуй комп'ютер",
+    "заблокуй екран",
+]
+
+
+[[commands]]
+id = "screenshot"
+type = "lua"
+script = "screenshot.lua"
+sandbox = "full"
+timeout = 5000
+
+[commands.phrases]
+ru = [
+    "сделай скриншот",
+    "скриншот",
+    "сними экран",
+]
+en = [
+    "take screenshot",
+    "screenshot",
+    "capture screen",
+]
+ua = [
+    "зроби скріншот",
+    "знімок екрана",
+]