ci(commitlint): addition of commit message linter

[tiborsimko]

Adds commitlint to check the commit message style against agreed
conventional commits configuration.

Changes script argument values to always use linter names (e.g.
shellcheck).

Changes argument handling to allow only one checking action that can now
accept further optional arguments.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (0798270) 37.66% compared to head (300f05d) 37.66%.

❗ Current head 300f05d differs from pull request most recent head 687f2f4. Consider uploading reports for the commit 687f2f4 to get more accurate results

Additional details and impacted files

@@           Coverage Diff           @@
##           master     #432   +/-   ##
=======================================
  Coverage   37.66%   37.66%           
=======================================
  Files          26       26           
  Lines        1561     1561           
=======================================
  Hits          588      588           
  Misses        973      973