Add contribution documentation.

[ivanklee86]

No description provided.

[github-actions]

Test Results

58 tests  ±0   58 ✅ ±0   10s ⏱️ +3s
 6 suites ±0    0 💤 ±0 
 1 files   ±0    0 ❌ ±0 

Results for commit 121bbb7. ± Comparison against base commit f7129bd.

[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 67.16%. Comparing base (f7129bd) to head (121bbb7).
⚠️ Report is 57 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #133   +/-   ##
=======================================
  Coverage   67.16%   67.16%           
=======================================
  Files          12       12           
  Lines         871      871           
=======================================
  Hits          585      585           
  Misses        286      286           

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