feat: fee on claim

[arr00]

Link T-4852

[height]

This pull request has been linked to 1 task:

• T-4852 Update Airdrop Tool contract to include optional fee (unlink task)

---

Previously linked tasks:

• T-4847 Airdrop Claim Fee (relink task)

💡Tip: Add "Close T-4852" to the pull request title or description, to a commit message, or in a comment to mark this task as "Done" when the pull request is merged.

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 81.63265% with 9 lines in your changes are missing coverage. Please review.

Project coverage is 59.00%. Comparing base (e637f8a) to head (56e5f09).
Report is 1 commits behind head on main.

Files	Patch %	Lines
src/Dropper.sol	81.63%	2 Missing and 7 partials ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main      #11      +/-   ##
==========================================
+ Coverage   52.77%   59.00%   +6.22%     
==========================================
  Files           2        2              
  Lines          72      100      +28     
  Branches       19       28       +9     
==========================================
+ Hits           38       59      +21     
- Misses         33       34       +1     
- Partials        1        7       +6     

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[0xble]

Nice. Great fuzzing tests