docs: introduce blogpost of ArgoCD and Keptn integration

[odubajDT]

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 85.33%. Comparing base (e044b51) to head (6df8642).

:exclamation: Current head 6df8642 differs from pull request most recent head 45ea026

Please upload reports for the commit 45ea026 to get more accurate results.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #3521      +/-   ##
==========================================
- Coverage   85.38%   85.33%   -0.06%     
==========================================
  Files         167      167              
  Lines        7412     7412              
==========================================
- Hits         6329     6325       -4     
- Misses        796      799       +3     
- Partials      287      288       +1     

see 1 file with indirect coverage changes

Flag	Coverage Δ
certificate-operator	69.23% <ø> (ø)
component-tests	58.04% <ø> (-0.33%)	:arrow_down:
lifecycle-operator	83.46% <ø> (ø)
metrics-operator	88.32% <ø> (ø)
scheduler	34.74% <ø> (ø)

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[odubajDT]

Very nicely done! I left a few minor suggestions for your consideration

Thank you for your review :)

[sonarqubecloud[bot]]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
No data about Coverage
0.0% Duplication on New Code

See analysis details on SonarCloud

[StackScribe]

Should this PR have at least a bit of a description, to set a good example for other contributors if nothing else. It might also be nice if it linked to https://github.com/keptn/lifecycle-toolkit/issues/3356 just so that issue has a comprehensive list of the work that's been done.