Add options for pooled extractions (not used yet)

[rkm]

Proposed Changes

Initial options for extraction file pool.

Types of changes

• Bugfix (non-breaking change which fixes an issue)
• New Feature (non-breaking change which adds functionality)
• Breaking Change (fix or feature that would cause existing functionality to not work as expected)
• Documentation-Only Update (if none of the other choices apply)
  • In this case, ensure that the message of the head commit from the source branch is prefixed with [skip ci]

Checklist

By opening this PR, I confirm that I have:

• Reviewed the contributing guidelines for this repository
• Ensured that the PR branch is in sync with the target branch (i.e. it is automatically merge-able)
• Updated any relevant API documentation
• Created or updated any tests if relevant
• Created a news file
  • NOTE: This must include any changes to any of the following files: default.yaml, any of the RabbitMQ server configurations, GlobalOptions.cs
• Listed myself in the CONTRIBUTORS file 🚀
• Requested a review by the @SMI/Reviewers team

Issues

[codecov]

Codecov Report

Attention: Patch coverage is 96.15385% with 1 line in your changes missing coverage. Please review.

Project coverage is 65.67%. Comparing base (39d4b9d) to head (dd821bf).
Report is 3 commits behind head on main.

Files with missing lines	Patch %	Lines
...es/Applications/ExtractImages/ExtractImagesHost.cs	87.50%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #2042      +/-   ##
==========================================
+ Coverage   65.56%   65.67%   +0.11%     
==========================================
  Files         183      183              
  Lines        6554     6576      +22     
  Branches      967      973       +6     
==========================================
+ Hits         4297     4319      +22     
  Misses       1966     1966              
  Partials      291      291              

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