The Actions log parser only recognized `[command]`, so runner command
output emitted as `##[command] ...` was not shown in expanded step logs.
Add `##[command]` support to `LogLinePrefixCommandMap` in
`web_src/js/components/ActionRunView.ts` and cover it with a regression
test in `web_src/js/components/ActionRunView.test.ts`.
Changes
- Fixes Actions UI log rendering for runner command output
- Adds support for ##[command] in the Actions log parser
- Ensures runner echo ... lines are rendered when expanding step logs
- Includes a regression test covering ##[command] foo parsing
Co-authored-by: Lunny Xiao <xiaolunwen@gmail.com>