feat: implement membership sale

[0xble]

Link T-3519

[height]

This pull request has been linked to 1 task:

• T-3519 Implement sell new memberships proposal at protocol level (unlink task)

💡Tip: Add "Close T-3519" 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: 44 lines in your changes are missing coverage. Please review.

Comparison is base (df8a02e) 65.56% compared to head (195dba2) 65.57%.

Files	Patch %	Lines
contracts/authorities/SellPartyCardsAuthority.sol	66.66%	39 Missing and 2 partials ⚠️
contracts/utils/LibSafeCast.sol	0.00%	3 Missing ⚠️

Additional details and impacted files

@@           Coverage Diff            @@
##              dev     #326    +/-   ##
========================================
  Coverage   65.56%   65.57%            
========================================
  Files          68       69     +1     
  Lines        2733     2861   +128     
  Branches      619      636    +17     
========================================
+ Hits         1792     1876    +84     
- Misses        744      786    +42     
- Partials      197      199     +2     

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[0xble]

Replaced by #328