Proccess file sync

[mirkoSekulic]

• Add MediatR package
• event and event handlers structure added
• fix endpoint and add tests
• delete taskName change endpoint

Description

Related Issue(s)

• Publish event when taskId is changed #12225
• Add mediator and setup init event infrastructure #12219

Verification

• Your code builds clean without any errors or warnings
• Manual testing done (required)
• Relevant automated test added (if you find this hard, leave it and we'll help out)

Documentation

• User documentation is updated with a separate linked PR in altinn-studio-docs. (if applicable)

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (e6f0c29) 86.42% compared to head (1bd7b07) 86.42%.
Report is 1 commits behind head on main.

❗ Current head 1bd7b07 differs from pull request most recent head ce0ff2b. Consider uploading reports for the commit ce0ff2b to get more accurate results

Additional details and impacted files

@@           Coverage Diff           @@
##             main   #12246   +/-   ##
=======================================
  Coverage   86.42%   86.42%           
=======================================
  Files        1188     1188           
  Lines       18049    18049           
  Branches     2292     2292           
=======================================
  Hits        15598    15598           
  Misses       2163     2163           
  Partials      288      288           

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[nkylstad]

Looks great!
I added one comment, just for consideration/out of curiosity 😊