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)

tools/scripts/test-loop.ttl

@@ -0,0 +1,17 @@
+; test-loop.ttl — while 迴圈 + 變數 + pause 測試
+; 不需遠端回應；觀察 Scripts 檢視的進度（行號/指令）與 log。
+; 執行中可按 Stop 中止。
+
+logopen 'loop.log'
+
+idx = 0
+while idx < 5
+    sendln 'echo loop'
+    logwrite 'iteration'
+    pause 1
+    idx = idx + 1
+endwhile
+
+logwrite 'loop finished'
+logclose
+messagebox 'Loop test done'