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/volume/command.toml

@@ -19,11 +19,6 @@ en = [
     "increase volume",
     "turn it up",
 ]
-ua = [
-    "голосніше",
-    "зроби голосніше",
-    "збільш гучність",
-]
 
 
 [[commands]]
@@ -47,11 +42,6 @@ en = [
     "decrease volume",
     "turn it down",
 ]
-ua = [
-    "тихіше",
-    "зроби тихіше",
-    "зменш гучність",
-]
 
 
 [[commands]]
@@ -75,11 +65,6 @@ en = [
     "shut up",
     "be quiet",
 ]
-ua = [
-    "вимкни звук",
-    "тиша",
-    "стихни",
-]
 
 
 [[commands]]
@@ -100,7 +85,3 @@ en = [
     "full volume",
     "maximum",
 ]
-ua = [
-    "максимальна гучність",
-    "звук на максимум",
-]