chore: CI workflows + drop Ukrainian (UA → just RU/EN)

CI (.github/workflows/ci.yml):
- Three parallel jobs on push & PR: cargo test (jarvis-core), cargo
  clippy (lint, warnings-as-errors), cargo check (workspace). Windows
  runner, stable toolchain, rust-cache for fast incremental builds.
- Deliberately skips release build of jarvis-gui — that needs Node+npm
  +Tauri bundler and would balloon CI to ~10min per push.

Drop Ukrainian:
- Delete ua.ftl, remove UA from SUPPORTED_LANGUAGES.
- config.rs: prune UA arms from get_wake_phrases / get_wake_grammar /
  get_phrases_to_remove / get_llm_trigger_phrases / get_llm_system_prompt.
- stt/vosk.rs: drop UA → uk language mapping.
- tray menu: drop "Українська" entry.
- frontend: drop UA from Header.svelte language list, settings page
  language map, i18n.ts fallback.
- 82 command.toml files stripped of every `ua = [...]` block (205
  blocks total). Handled via subagent — TOML still parses, all 6 command
  tests pass.

.gitignore: stop tracking dev.env / dll_probe*.py / imports_full.txt
which were sitting in working tree.

Tests: 128 pass (no regression). Workspace still compiles end-to-end.

resources/commands/unit_convert/command.toml

@@ -22,7 +22,6 @@ ru = [
     "переведи в мили",
 ]
 en = ["convert meters to feet", "convert feet to meters", "how many meters", "how many feet"]
-ua = ["переведи метри у фути"]
 
 
 [[commands]]
@@ -41,7 +40,6 @@ ru = [
     "сколько килограммов",
 ]
 en = ["convert kg to pounds", "how many pounds", "how many kg"]
-ua = ["переведи кг у фунти"]
 
 
 [[commands]]
@@ -60,7 +58,6 @@ ru = [
     "сколько градусов в фаренгейтах",
 ]
 en = ["convert celsius to fahrenheit", "celsius to fahrenheit", "fahrenheit to celsius"]
-ua = ["переведи цельсій у фаренгейт"]
 
 
 [[commands]]
@@ -79,4 +76,3 @@ ru = [
     "сколько км в час",
 ]
 en = ["convert kmh to mph", "kmh to mph", "mph to kmh"]
-ua = ["переведи кмг у миль на годину"]