feat: ERC20 crowdfunds

[0xble]

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Gas Report:

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 0% with 34 lines in your changes are missing coverage. Please review.

Project coverage is 55.98%. Comparing base (136ed9b) to head (51dc874).

Files	Patch %	Lines
contracts/crowdfund/ERC20LaunchCrowdfund.sol	0.00%	28 Missing ⚠️
contracts/crowdfund/CrowdfundFactory.sol	0.00%	6 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff             @@
##             main     #381       +/-   ##
===========================================
- Coverage   66.82%   55.98%   -10.84%     
===========================================
  Files          70       71        +1     
  Lines        2963     2997       +34     
  Branches      647      652        +5     
===========================================
- Hits         1980     1678      -302     
- Misses        783     1136      +353     
+ Partials      200      183       -17     

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