refactor: move acp bridge to frontends/

frontends/genericagent_acp_bridge.py

@@ -3,6 +3,8 @@ import json
 import os
 import sys
 
+sys.path.insert(0, os.path.dirname(os.path.dirname(os.path.abspath(__file__))))
+
 # Must run BEFORE importing agentmain — it reconfigures stdout at import time,
 # and its submodules may print() during init.  We capture the raw binary stdout
 # for ACP JSON-RPC, then redirect the text-mode stdout to stderr so any stray