feat: restore ACP server implementation from PR #949 (#1254)

Restore the ACP editor-integration implementation that was present on the
original PR branch but did not actually land in main.

Includes:
- acp_adapter/ server, session manager, event bridge, auth, permissions,
  and tool helpers
- hermes acp subcommand and hermes-acp entry point
- hermes-acp curated toolset
- ACP registry manifest, setup guide, and ACP test suite
- jupyter-live-kernel data science skill from the original branch

Also updates the revived ACP code for current main by:
- resolving runtime providers through the modern shared provider router
- binding ACP sessions to per-session cwd task overrides
- tracking duplicate same-name tool calls with FIFO IDs
- restoring terminal approval callbacks after prompts
- normalizing supporting docs/skill metadata

Validated with tests/acp and the full pytest suite (-n0).

toolsets.py

@@ -224,6 +224,25 @@ TOOLSETS = {
     # All platforms share the same core tools (including send_message,
     # which is gated on gateway running via its check_fn).
     # ==========================================================================
+
+    "hermes-acp": {
+        "description": "Editor integration (VS Code, Zed, JetBrains) — coding-focused tools without messaging, audio, or clarify UI",
+        "tools": [
+            "web_search", "web_extract",
+            "terminal", "process",
+            "read_file", "write_file", "patch", "search_files",
+            "vision_analyze",
+            "skills_list", "skill_view", "skill_manage",
+            "browser_navigate", "browser_snapshot", "browser_click",
+            "browser_type", "browser_scroll", "browser_back",
+            "browser_press", "browser_close", "browser_get_images",
+            "browser_vision",
+            "todo", "memory",
+            "session_search",
+            "execute_code", "delegate_task",
+        ],
+        "includes": []
+    },
     
     "hermes-cli": {
         "description": "Full interactive CLI toolset - all default tools plus cronjob management",