The repository github.com/myitcv/gobin has already been archived,
and the `go install` command accepts arguments with version suffixs
starting from 1.16 (for example, go install example.com/cmd@v1.0.0).
So there is no reason to continue to use gobin.
Replace ./scripts/install_tool.sh with `gobin`, such that we have
consistent handling for all tools needed for build and consistent
versioning within ./tools/mod/go.mod.
Side changes:
- Expose /scripts/fix.sh that fixes formatting and bom across modules
- Expose *.sh variants of scripts like build and ./test (first step
towards replacement).
- Make stderr output of commands explicit and make commands use
different color than callouts.
