Add perles TUI package for Beads issue tracking

Adds a custom Nix package for perles, a terminal user interface for the
Beads issue tracking system with BQL query language support.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

home/roles/development/default.nix

@@ -44,6 +44,7 @@ in
 
       # Custom packages
       pkgs.custom.tea-rbw
+      pkgs.custom.perles
     ];
 
     # Install Claude Code humanlayer command and agent plugins