Add Trae client support

[niechen]

This PR adds support for the Trae AI client by implementing a TraeManager class and updating the necessary registry files.

Closes #92

[Copilot]

Pull Request Overview

This PR adds support for the Trae AI client by implementing a new TraeManager class and updating the necessary registry files to register Trae as a supported client.

• Introduces a TraeManager class in src/mcpm/clients/managers/trae.py
• Registers TraeManager in the client managers init and client_registry files
• Updates the main clients init to include TraeManager

Reviewed Changes

Copilot reviewed 4 out of 4 changed files in this pull request and generated no comments.

File	Description
src/mcpm/clients/managers/trae.py	New TraeManager implementation with platform-specific config path logic
src/mcpm/clients/managers/init.py	Added TraeManager import and all entry
src/mcpm/clients/client_registry.py	Instantiated TraeManager in the registry
src/mcpm/clients/init.py	Included TraeManager in the module exports

Comments suppressed due to low confidence (1)

src/mcpm/clients/managers/trae.py:29

• The attribute '_system' is used to determine the platform but is not initialized within TraeManager. Consider initializing '_system' (for example, using platform.system()) in the init method if it is not already set by the parent class.

if config_path: