feat: New Adapter - KYC Onboarding

[adridadou]

Adds a new KycOnboarding adapter that let's verified individuals to redeem coupons to join the DAO.

Proposed Changes

• adds the KYC adapter
• adds WETH helper
• Allows transfers from multsig address
• cleans up the deployment script further
• Docs

[codecov]

Codecov Report

Merging #437 (99a7d7d) into master (17a89b3) will increase coverage by 0.50%.
The diff coverage is 93.05%.

❗ Current head 99a7d7d differs from pull request most recent head 003e792. Consider uploading reports for the commit 003e792 to get more accurate results

@@            Coverage Diff             @@
##           master     #437      +/-   ##
==========================================
+ Coverage   80.96%   81.47%   +0.50%     
==========================================
  Files          46       47       +1     
  Lines        1655     1727      +72     
  Branches      390      411      +21     
==========================================
+ Hits         1340     1407      +67     
- Misses        315      320       +5     

Impacted Files	Coverage Δ
contracts/helpers/DaoHelper.sol	88.46% <ø> (ø)
contracts/adapters/KycOnboarding.sol	93.05% <93.05%> (ø)

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