Update .bazelrc

[michael-christen]

Configure .bazelrc according to aspect's guidance.
Import a few vendored files and use those to set up.

Misc.

• noticed emboss wasn't represented canonically, so switched to commit instead of tag to avoid warning.
• specify allow_empty=True in a few glob rules

See #172 for related followups on a few things that didn't work in my current setup.
See #173 for possible modifications to my remote cache

See these for more reference:
https://docs.aspect.build/guides/bazelrc/
https://bazel.build/run/bazelrc
https://github.com/bazel-contrib/bazel-lib/tree/5853e2e441df850dc332910a0808e9dee2ed9e27/.aspect/bazelrc
https://bazel.build/reference/command-line-reference#flag--host_jvm_args

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 100.00%. Comparing base (f26d0e9) to head (9701302).
Report is 1 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff            @@
##            master      #168   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files            9         9           
  Lines          184       184           
=========================================
  Hits           184       184