Initial commit: UnifiMultimirror port mirroring tool

- TUI application (Textual) for interactive port selection
- CLI application (Rich) as alternative interface
- SSH manager for device connection
- Config parser for running-config, interface status, port-channel
- Script generator for Bash, Python, and command files
- Support for multiple source ports and LAG interfaces

Co-authored-by: Cursor <cursoragent@cursor.com>

requirements.txt

@@ -0,0 +1,4 @@
+paramiko>=3.0.0
+cryptography>=41.0.0
+rich>=13.0.0
+textual>=0.47.0