feat: add built-in support for TypeScript enums & readonly arrays in DataTypes.ENUM
#16488
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Pull Request Checklist
Description Of Change
This PR adds support for using TypeScript enums as the list of allowed values in
DataTypes.ENUM
.The enum must be a string enum and the values must be equal to their keys, as we do not do any sort of mapping. This may be changed in the future, this is only a small improvement.
It also accepts readonly arrays.
Closes #15253
Closes #15256