feat: PCA SSH Manager v1.1

Portable SSH client with auto-save sessions.
- Session groups (drag-and-drop between groups)
- 100+ quick commands for Linux and Keenetic routers
- Built-in command suggestion agent
- Dark theme (Catppuccin), PCA branding
- Builds to .exe (Windows) or .app (macOS)

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

.gitignore

@@ -0,0 +1,6 @@
+build/
+dist/
+__pycache__/
+*.spec
+*.pyc
+sessions.json