Per-agent x64dbg session through debugger()/debugger_tools()

Harbor starts the x64dbg-automate MCP server (stdio) on first use and keeps
it for the life of the agent's Harbor process; the debuggee is terminated
when that process exits. Configured by debugger_command/_path/_temp in
[reverse].

harbor/cli.py

@@ -255,7 +255,7 @@ def build_parser():
     p = sub.add_parser("who", help="who has worked on a scope (notes, reviews, claims, messages)")
     p.add_argument("scope")
     p = sub.add_parser("re", help="reverse-engineering lookups from the project's image and annotations")
-    p.add_argument("action", choices=["disasm", "xrefs", "bytes", "lookup", "ghidra", "ghidra-tools"])
+    p.add_argument("action", choices=["disasm", "xrefs", "bytes", "lookup", "ghidra", "ghidra-tools", "debugger-tools"])
     p.add_argument("target", nargs="?", default="", help="an address (0x4AD850) or a name; for ghidra, the tool")
     p.add_argument("arguments", nargs="?", default="{}", help="ghidra: the tool's arguments as JSON")
     p.add_argument("--max-bytes", type=int, dest="max_bytes")
@@ -675,8 +675,13 @@ def main(argv=None):
         out(r, f"summary #{r['id']} pinned to {r['thread']}")
     elif cmd == "re":
         from .reverse import Ghidra, Reverse
-        r = None if args.action.startswith("ghidra") else Reverse(harbor.project.reverse)
-        if args.action == "ghidra-tools":
+        r = None if args.action.startswith(("ghidra", "debugger")) else Reverse(harbor.project.reverse)
+        if args.action == "debugger-tools":
+            from .reverse import Debugger
+            res = Debugger(harbor.project.reverse).tools()
+            out(res, "\n".join(f"{t['name']:<22} {(t['description'] or '').splitlines()[0][:90] if t['description'] else ''}"
+                                for t in res))
+        elif args.action == "ghidra-tools":
             res = Ghidra(harbor.project.reverse).tools()
             out(res, "\n".join(f"{t['name']:<26} {t['description'].splitlines()[0][:90]}" for t in res))
         elif args.action == "ghidra":