Coding guidelines for external contributions

[ashmeenkaur]

Description

Added coding guidelines for external contributions.

Link to the issue in case of a bug fix.

NA

Testing details

1. Manual - NA
2. Unit tests - NA
3. Integration tests - NA

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 77.53%. Comparing base (fdcacdb) to head (996a9a7).
Report is 4 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #2634      +/-   ##
==========================================
+ Coverage   77.43%   77.53%   +0.09%     
==========================================
  Files         110      110              
  Lines       15676    15698      +22     
==========================================
+ Hits        12139    12171      +32     
+ Misses       3016     3008       -8     
+ Partials      521      519       -2     

Flag	Coverage Δ
unittests	77.53% <ø> (+0.09%)	⬆️

Flags with carried forward coverage won't be shown. Click here to find out more.

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

[charith87]

Approving as overall seems fine from my side.
Incremental changes can be done as separate PRs as necessary.