feat: initial release v0.1.0

- KKTerm-style UI: Activity Rail, Connection Sidebar, Tabbed Workspace
- Serial Port connection (System.IO.Ports)
- SSH connection (SSH.NET, password/key/keyboard-interactive)
- Local Shell via Windows ConPTY (PowerShell/Bash/Cmd)
- VT100/ANSI terminal rendering (owner-drawn, double-buffered)
- TTL script engine: send, sendln, wait, pause, timeout, if/while, messagebox
- Group execution: waitall, sendlnall, sendlngroup (Barrier sync)
- Run All / Run Group toolbar buttons
- SFTP file browser sidebar (SSH.NET SftpClient)
- PDU control via SNMP (pduconnect/pductrl commands)
- Settings: Terminal prefs, Shell config, PDU monitoring
- About page with changelog
- AppSettings persisted to %LocalAppData%\ETTerms\
- Dark theme throughout (KKTerm purple accent)

.gitignore

@@ -0,0 +1,16 @@
+# ─── .NET / WinForms build 產物 ───────────────────────────────
+bin/
+obj/
+*.user
+publish/
+[Dd]ebug/
+[Rr]elease/
+.vs/
+
+# ─── 本機資料庫 / 設定（執行期產生）───────────────────────────
+*.sqlite
+*.sqlite-shm
+*.sqlite-wal
+
+# ─── AI 協作素材 / 參考專案不入 git ──────────────────────────
+For_AI/