build: improve developer experience ❤️

[robertrossmann]

• provides a bunch of goodies for VS Code users, like mapping the test command to the default test task in VS Code (so you can run your test suite with a keyboard shortcut)
• adds a list of recommended extensions, in case you are new to either Go or VS Code
• provides some basic VS Code configuration to make working with Go nicer
• provides problem matchers for both VS Code and Github Actions. In VS Code, test failures and lint issues are automatically listed also in the Problems panel. In Actions, the same issues are now listed in the Action run's Summary as Annotations.

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 98.37%. Comparing base (cdbbef8) to head (1724061).

Additional details and impacted files

@@                 Coverage Diff                 @@
##           feat/cleanup-vol-2      #10   +/-   ##
===================================================
  Coverage               98.37%   98.37%           
===================================================
  Files                       3        3           
  Lines                     123      123           
===================================================
  Hits                      121      121           
  Misses                      2        2           

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