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)

ETTerms.slnx

@@ -0,0 +1,5 @@
+<Solution>
+  <Folder Name="/src/">
+    <Project Path="src/ETTerms/ETTerms.csproj" />
+  </Folder>
+</Solution>