Add Contributing guideline w/ .NET analyzer rules

[mocsharp]

• Add CONTRIBUTING.md
• Update .editorconfig file with .NET analyzer rules to enforce coding styles, naming conventions
• Add CODE_OF_CONDUCT.md

[codecov]

Codecov Report

Merging #72 (73390f3) into main (33274f4) will decrease coverage by 0.76628%.
The diff coverage is n/a.

@@                 Coverage Diff                 @@
##                main         #72         +/-   ##
===================================================
- Coverage   89.27203%   88.50575%   -0.76628%     
===================================================
  Files             22          22                 
  Lines            522         522                 
  Branches          20          20                 
===================================================
- Hits             466         462          -4     
- Misses            52          55          +3     
- Partials           4           5          +1     

Flag	Coverage Δ
unittests	88.50575% <ø> (-0.76628%)	⬇️

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

Impacted Files	Coverage Δ
...adManager/Test/Services/Http/PayloadServiceTest.cs	76.92308% <0.00000%> (-10.25642%)	⬇️
...vices/JobSchedulingService/JobSchedulingService.cs	92.59259% <0.00000%> (-7.40741%)	⬇️
...ionDiscoveryService/ApplicationDiscoveryService.cs	92.59259% <0.00000%> (-7.40741%)	⬇️
...vices/DataDiscoveryService/DataDiscoveryService.cs	100.00000% <0.00000%> (+7.40740%)	⬆️
...vices/DataRetentionService/DataRetentionService.cs	100.00000% <0.00000%> (+7.40740%)	⬆️

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[sonarcloud]

Kudos, SonarCloud Quality Gate passed!   

0 Bugs
0 Vulnerabilities
0 Security Hotspots
0 Code Smells

No Coverage information
No Duplication information

[mocsharp]

@joshliberty and team, please feel free to modify the rules if needed.