feat(session): add session removal endpoint and refactor session management

- Implement new `/sessionMgr/remove` endpoint for superusers to remove sessions
- Refactor session and token management to use sessionTokenMap for better tracking
- Update session cleanup logic to handle both tokens and sessions
- Add documentation for new API endpoint in docs/api.md
- Modify logout handler to use new session removal approach

README.md

@@ -38,7 +38,7 @@ Create a `config.json` file in the project root:
 ## Build
 
 ```bash
-go build -o super-frpc
+go build -o super-frpc.exe
 ```
 
 For Linux:
@@ -60,7 +60,7 @@ For detailed API documentation, please see [docs/api.md](docs/api.md)
 
 - [x] Add Windows boot service support
 - [x] Add session list API
-- [ ] Add session management API
+- [x] Add session management API
 - [ ] Add codes per file documentation
 - [ ] Add user config modify API