chore: remove all remaining mini-swe-agent references

Complete cleanup after dropping the mini-swe-agent submodule (PR #2804):

- Remove MSWEA_SILENT_STARTUP and MSWEA_GLOBAL_CONFIG_DIR env var
  settings from cli.py, run_agent.py, hermes_cli/main.py, doctor.py
- Remove mini-swe-agent health check from hermes doctor
- Remove 'minisweagent' from logger suppression lists
- Remove litellm/typer/platformdirs from requirements.txt
- Remove mini-swe-agent install steps from install.ps1 (Windows)
- Remove mini-swe-agent install steps from website docs
- Update all stale comments/docstrings referencing mini-swe-agent
  in terminal_tool.py, tools/__init__.py, code_execution_tool.py,
  environments/README.md, environments/agent_loop.py
- Remove mini_swe_runner from pyproject.toml py-modules
  (still exists as standalone script for RL training use)
- Shrink test_minisweagent_path.py to empty stub

The orphaned mini-swe-agent/ directory on disk needs manual removal:
  rm -rf mini-swe-agent/

run_agent.py

@@ -58,9 +58,6 @@ if _loaded_env_paths:
 else:
     logger.info("No .env file found. Using system environment variables.")
 
-# Point mini-swe-agent at ~/.hermes/ if installed (RL training use)
-os.environ.setdefault("MSWEA_GLOBAL_CONFIG_DIR", str(_hermes_home))
-os.environ.setdefault("MSWEA_SILENT_STARTUP", "1")
 
 # Import our tool system
 from model_tools import get_tool_definitions, handle_function_call, check_toolset_requirements
@@ -661,7 +658,7 @@ class AIAgent:
                 # INFO/WARNING messages just clutter it.
                 for quiet_logger in [
                     'tools',               # all tools.* (terminal, browser, web, file, etc.)
-                    'minisweagent',         # mini-swe-agent execution backend
+                    
                     'run_agent',            # agent runner internals
                     'trajectory_compressor',
                     'cron',                 # scheduler (only relevant in daemon mode)