fix(mcp): auto-register tools on startup and support cross-platform setup for all major AI IDEs

- Fix missing mcp_server.tools import on server initialization so mobile_run_task, mobile_manage_task, mobile_get_device_state, and mobile_inspect_trace are automatically registered.

- Inject PYTHONPATH in generated and installed MCP configurations to guarantee Python module resolution across Windows, macOS, and Linux regardless of IDE CWD.

- Expand artemis mcp --install and --generate-config to support VS Code, Cline, Roo Code, Claude Code CLI (~/.claude.json), Cursor, Windsurf, Antigravity, and OpenClaw.

- Enhance config file merging with robust exception handling and fallback initialization.

mcp_server/base.py

@@ -16,6 +16,13 @@
 
 from mcp.server.fastmcp import FastMCP
 
+try:
+    from mcp.server.fastmcp.server import Settings as FastMCPSettings
+
+    FastMCPSettings.model_rebuild()
+except Exception:
+    pass
+
 # Define the shared FastMCP instance for external IDE and agent clients.
 mcp = FastMCP(
     "artemis",
@@ -27,3 +34,6 @@ mcp = FastMCP(
         "and mobile_inspect_trace to inspect detailed execution steps and visual action overlays."
     ),
 )
+
+# Import tools so they are registered with the mcp instance upon module load
+import mcp_server.tools  # noqa: E402, F401