Use recursive ignore for ext and lib folders

[medariox]

• PR is based on the DEVELOP branch
• Don't send big changes all at once. Split up big PRs into multiple smaller PRs that are easier to manage and review
• Read the contribution guide

[codecov-io]

Codecov Report

Merging #3392 into develop will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff            @@
##           develop    #3392   +/-   ##
========================================
  Coverage    32.98%   32.98%           
========================================
  Files          275      275           
  Lines        34586    34586           
========================================
  Hits         11407    11407           
  Misses       23179    23179

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