Add SmartEnumNameAttribute, a DataAnnotations ValidationAttribute

[sdepouw]

• Implements enhancement Add a ValidationAttribute to Validate Model Property Against SmartEnum Names #446
• Add SmartEnumNameAttribute
  • Can be used in DataAnnotations contexts to validate a property against the Names of a specified SmartEnum
  • Configurable
    • Can customize error message, referencing the property validated and the list of valid SmartEnum Name values
    • Can specify whether or not case sensitivity is rquired
  • Allows nulls (expectation is that user will use [Required] to enforce no nulls)
• Tests added for SmartEnumNameAttribute
• Update README.md
  • Add documentation for SmartEnumNameAttribute
  • Fixed my name 😎
• Update CONTRIBUTING.md to reference this project instead of Ardalis.GuardClauses

[ardalis]

Is this ready to merge?

[sdepouw]

Is this ready to merge?

Yep, should be!

[sdepouw]

@ardalis noticed this PR was still open. Should be good to go!