feat(tools/magrathea): implement run command r/3857

This command builds the desired target and runs the executable produced
by it. If a directory is produced, it looks for a single (!) executable
in the bin directory. Dot files are ignored, so wrappers should
generally work. In the future we could provide a flag to select one of
multiple executables.

All arguments following the target are passed to the executable as is.

Examples:

    mg run ops/mq_cli ls
    mg run web/bubblegum:examples

Change-Id: I6490668af68e028520973196d9daa5f1d58969ee
Reviewed-on: https://cl.tvl.fyi/c/depot/+/5277
Tested-by: BuildkiteCI
Reviewed-by: tazjin <tazjin@tvl.su>

0 files changed, 0 insertions, 0 deletions