Add FetchAndLockRequestProvider

[TechnoBerry]

Closes #43

[codecov-commenter]

Codecov Report

Merging #45 (bd55184) into master (d073eb0) will increase coverage by 0.60%.
The diff coverage is 100.00%.

❗ Current head bd55184 differs from pull request most recent head 40c2253. Consider uploading reports for the commit 40c2253 to get more accurate results

@@            Coverage Diff             @@
##           master      #45      +/-   ##
==========================================
+ Coverage   94.04%   94.64%   +0.60%     
==========================================
  Files          32       34       +2     
  Lines         336      355      +19     
  Branches        7        7              
==========================================
+ Hits          316      336      +20     
+ Misses         18       17       -1     
  Partials        2        2              

Impacted Files	Coverage Δ
...rc/Camunda.Worker/Execution/FetchAndLockOptions.cs	100.00% <ø> (+11.11%)	⬆️
src/Camunda.Worker/CamundaWorkerBuilder.cs	100.00% <100.00%> (ø)
...c/Camunda.Worker/Execution/DefaultCamundaWorker.cs	100.00% <100.00%> (ø)
...ker/Execution/LegacyFetchAndLockRequestProvider.cs	100.00% <100.00%> (ø)
src/Camunda.Worker/ServiceCollectionExtensions.cs	100.00% <100.00%> (ø)
src/Camunda.Worker/WorkerServiceOptions.cs	100.00% <100.00%> (ø)

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