Move all three skills into skills/; add root README; fix paths

Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>

tests/test_pricing.py

@@ -5,7 +5,7 @@ from pathlib import Path
 
 import pytest
 
-SRC = Path(__file__).resolve().parents[1] / "rpa-dashboard-ai" / "templates" / "web" / "pricing.py"
+SRC = Path(__file__).resolve().parents[1] / "skills" / "rpa-dashboard-ai" / "templates" / "web" / "pricing.py"
 spec = importlib.util.spec_from_file_location("pricing", SRC)
 pricing = importlib.util.module_from_spec(spec)
 spec.loader.exec_module(pricing)