feat (renovate): Adding self-hosting of Renovate

[steingran]

Adding self-hosting of Renovate, to keep nugets updated

[augmentcode]

Review completed. 2 suggestions posted. Primary concerns are workflow parsing/version issues that could prevent Renovate from running as intended.

Comment augment review to trigger a new review at any time.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 75.27%. Comparing base (307a47b) to head (1e8151a).
⚠️ Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main      #77      +/-   ##
==========================================
+ Coverage   74.96%   75.27%   +0.31%     
==========================================
  Files          36       36              
  Lines        2237     2237              
  Branches      310      310              
==========================================
+ Hits         1677     1684       +7     
+ Misses        449      442       -7     
  Partials      111      111              

see 2 files with indirect coverage changes

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