feat: Easy API — purpose(), Team, quickstart wizard, template auto-detection

purpose_agent/__init__.py

@@ -87,6 +87,9 @@ from purpose_agent.unified import (
     START, END, Message,
 )
 
+# Easy API (the only thing beginners need)
+from purpose_agent.easy import purpose, Team, quickstart, TEAM_TEMPLATES
+
 __all__ = [
     # Core
     "State", "Action", "Trajectory", "TrajectoryStep", "Heuristic",
@@ -119,4 +122,6 @@ __all__ = [
     # Unified Capabilities
     "Agent", "Graph", "parallel", "Conversation", "KnowledgeStore",
     "START", "END", "Message",
+    # Easy API
+    "purpose", "Team", "quickstart", "TEAM_TEMPLATES",
 ]