docs: 📝 Documentation added

docs/lib/utils/SafeTransferLib.md

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+# SafeTransferLib
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+*Solmate (https://github.com/Rari-Capital/solmate/blob/main/src/utils/SafeTransferLib.sol)*
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+
+
+Safe ETH and ERC20 transfer library that gracefully handles missing return values.
+
+*Caution! This library won't check that a token has code, responsibility is delegated to the caller.*
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+