feat: membership sale

[arr00]

No description provided.

[height]

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[github-actions]

Gas Report:
Create party custom metadata: 727886
Create party vanilla: 298514
Contribute to ETH party: 202694
Batch contribute two memberships to ETH party: 275336
Create proposal transfer eth: 136305
Execute proposal transfer eth: 123157
Create proposal distribute: 141158
Execute proposal distribute: 227506
Claim distribution: 72061

[arr00]

@0xble I believe that the fact that all delegates are only initial delegates should be documented.

[codecov-commenter]

Codecov Report

Attention: 13 lines in your changes are missing coverage. Please review.

Comparison is base (b437f3d) 64.42% compared to head (2c321c7) 65.68%.

Files	Patch %	Lines
contracts/authorities/SellPartyCardsAuthority.sol	94.44%	4 Missing and 3 partials ⚠️
contracts/utils/LibSafeCast.sol	0.00%	6 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #328      +/-   ##
==========================================
+ Coverage   64.42%   65.68%   +1.26%     
==========================================
  Files          65       66       +1     
  Lines        2617     2751     +134     
  Branches      596      616      +20     
==========================================
+ Hits         1686     1807     +121     
- Misses        740      750      +10     
- Partials      191      194       +3     

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