Refactor access card handling and update CLI output for tunnel operations

- Integrated `print_access_card` functionality into the `up` command for both tunneled and non-tunneled scenarios.
- Removed the deprecated `print_mcp_snippet` function from the session management flow.
- Updated the `tunnel_forwards` function to streamline port handling for LLM runtimes.
- Enhanced test cases to reflect changes in access card printing and MCP snippet logging.

src/gpu_rent/session.py

@@ -24,7 +24,7 @@ from gpu_rent.bootstrap import run_bootstrap
 from gpu_rent.provision import provision_vm
 from gpu_rent.ready import wait_backend_idle
 from gpu_rent.snapshot import ensure_boot_snapshot
-from gpu_rent.notify import notify_ready, print_mcp_snippet
+from gpu_rent.notify import notify_ready
 from gpu_rent.config import Config
 from gpu_rent.errors import CloudError, GpuRentError
 from gpu_rent.inventory import (
@@ -125,7 +125,6 @@ def _bind_access(
     except CloudError as exc:
         log(f"snapshot: {exc}")
     notify_ready(cfg, log)
-    print_mcp_snippet(cfg, log)
     state.bootstrapped = True
     state.phase = "ready_cloud"
     save_state(state)