[top_darjeeling] Is there a bazel BUILD config to build rom for Darjeeling?

### desc

I am trying to build the rom code for Darjeeling. Is there any reference bazel BUILD setting, then can help to quickly build the rom code for Darjeeling to test?

Start by searching the repository for existing Bazel BUILD files and the Darjeeling ROM build entry points; the issue names no specific file or test. Determine whether a reusable BUILD configuration already exists and whether the documented build can produce a ROM suitable for testing.

Written by the indexing model from the issue text.