feat(openai): add chat streaming and model commands

- add /openai (/chatgpt) chat command using OpenAI Responses API (streaming + incremental edits)
- add /openAIListModels, /openAIGetModel, /openAISetModel
- introduce base Command class and migrate non-chat commands to it
- wire OpenAI client + env vars (OPENAI_API_KEY, OPENAI_MODEL)
- bump deps (@google/genai, systeminformation, @types/node) and add openai

package.json

@@ -8,7 +8,7 @@
     "bun:start": "bun run dist/index.js"
   },
   "dependencies": {
-    "@google/genai": "^1.38.0",
+    "@google/genai": "^1.39.0",
     "@libsql/client": "^0.17.0",
     "@mistralai/mistralai": "^1.13.0",
     "@napi-rs/canvas": "^0.1.89",
@@ -17,19 +17,20 @@
     "drizzle-orm": "^1.0.0-beta.12-5845444",
     "emoji-regex": "^10.6.0",
     "ollama": "^0.6.3",
+    "openai": "^6.17.0",
     "puppeteer": "^24.36.1",
     "puppeteer-extra": "^3.3.6",
     "puppeteer-extra-plugin-stealth": "^2.11.2",
     "qrcode": "^1.5.4",
     "sharp": "^0.34.5",
-    "systeminformation": "^5.30.6",
+    "systeminformation": "^5.30.7",
     "twemoji": "^14.0.2",
     "typescript-telegram-bot-api": "^0.11.0",
     "youtubei.js": "^16.0.1"
   },
   "devDependencies": {
     "@types/bun": "^1.3.8",
-    "@types/node": "^25.1.0",
+    "@types/node": "^25.2.0",
     "@types/qrcode": "^1.5.6",
     "@typescript-eslint/eslint-plugin": "^8.54.0",
     "@typescript-eslint/parser": "^8.54.0",