Create linkcheck.yml to check links in .md files

[gaugup]

Signed-off-by: Gaurav Gupta [email protected]

[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 87.70%. Comparing base (5547459) to head (9498075).
⚠️ Report is 34 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #550   +/-   ##
=======================================
  Coverage   87.70%   87.70%           
=======================================
  Files          62       62           
  Lines        4075     4075           
=======================================
  Hits         3574     3574           
  Misses        501      501           

Flag	Coverage Δ
unittests	87.70% <ø> (ø)

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