feat(coder/modules/trae-cn): add Trae CN IDE module

[lecion]

Summary

Adds a new official coder/trae-cn module that opens workspaces in Trae CN using the verified trae-cn://coder.coder-remote/open protocol and the shared vscode-desktop-core module.

The module includes:

• Terraform inputs matching the existing desktop IDE modules: agent_id, folder, open_recent, order, group, slug, and display_name
• A trae_cn_url output for the generated launch URI
• README frontmatter and usage examples
• A high-resolution Trae CN icon extracted from the local app icon
• Optional MCP configuration via mcp, with default writes to folder/.trae/mcp.json or $HOME/.trae/mcp.json
• mcp_config_path for writing MCP config outside a repository when the config contains credentials
• Terraform and Bun tests covering default URLs, folder handling, open_recent, app metadata, ordering, icon metadata, and MCP script generation

Validation

• terraform init -upgrade && terraform test -verbose in registry/coder/modules/trae-cn
• bun test main.test.ts in registry/coder/modules/trae-cn
• go run ./cmd/readmevalidation
• bun run fmt:ci
• git diff --check

Note: during local validation, terraform init intermittently failed against registry.coder.com and GitHub with network timeouts or unexpected EOFs. Retrying after connectivity recovered succeeded.

Generated with Codex using GPT-5.

[matifali]

I can not access it, so I can't verify. Can you please move it to a new namespace under your own name?