build

Description of the feature request:

For better bash-less Windows support,ctx.actions.run_shell could add command_bat (with the same behavior as genrule's cmd_bat) and command_ps (with the same behavior as genrule's cmd_ps).

This would, in particular, considerably simplify skylib's Windows support, where currently we are forced to write and execute temporary .bat files on Wind

Request to create a syntax highlight package for Atom IDE https://atom.io/

Related to #1203 #359

source: https://insights.stackoverflow.com/survey/2021#most-popular-technologies-new-collab-tools

Issue Description

Requesting a binary log (/bl) will print a line to the terminal which isn't printed otherwise (when doing quiet builds).

Steps to Reproduce

$ msbuild test.csproj /bl /verbosity:quiet /nologo
/Library/Frameworks/Mono.framework/Versions/6.12.0/lib/mono/msbuild/15.0/bin/MSBuild.dll /nologo /bl /verbosity:quiet test.csproj

Expected Behavior

We are using font-awesome V4 and should migrate to font-awesome V5 which comes with its own vue.js module: https://github.com/FortAwesome/vue-fontawesome

Migration includes removing old font-awesome V4 module and changing all existing icons to new vue.js tag.

This is blocked until #114 is merged which comes with first initial integration.

#16398 introduces a validate mode for caches which uses ShardedLmdb::exists (rather than load_bytes_with) for the first time. But because it is always consumed in a batch mode (to check that all files referenced by a cache entry exist), that method should likely be converted into a batch call which [partitions by shard similar to store_bytes_batch](https://github.com/pantsbuild/pants/blo

What version of Garble and Go are you using?

$ garble version
v0.4.1-0.20210929123233-e7320ec9c034
$ go version
go version go1.17.2 linux/amd64

What environment are you running Garble on?

Desired Behavior

Per my discussion with @rgrinberg on Discord earlier, as of now in order to include an object file in compilation, it first needs to be embedded in a .a file with ar.

My thought was to add a (foreign_objects <foreign-objects-list>) field that behaves the same way as `(foreign_archives <foreign-archives-l