Add session connector: Trae

[Railly]

Context

Trae stores skills in ~/.trae/skills/. Need to investigate session data format.

What's Needed

1. Investigate Trae's session storage format
2. Determine if skill invocations are trackable
3. If trackable: build connector at packages/cli/src/scanner/connectors/trae.ts

References

• Skills path: ~/.trae/skills/