Add strcase

[charlievieth]

The strcase and bytcase libraries provide efficient case-insensitive search functions that are Unicode aware and are a drop-in replacement for the strings/bytes packages.

Docs: https://pkg.go.dev/github.com/charlievieth/strcase@master
Report: https://goreportcard.com/report/github.com/charlievieth/strcase
Coverage: https://app.codecov.io/github/charlievieth/strcase

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• I have read the Contribution Guidelines
• I have read the Maintainers Note
• I have read the Quality Standards

Not every repository (project) will require every option, but most projects should. Check the Contribution Guidelines for details.

• The repo documentation has a pkg.go.dev link.
• The repo documentation has a coverage service link.
• The repo documentation has a goreportcard link.
  • NB: I can add a link to the goreportcard, but never thought it necessary considering how exhaustive/exacting the current CI tests are.
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Please provide some links to your package to ease the review

• forge link (github.com, gitlab.com, etc): https://github.com/charlievieth/strcase
• pkg.go.dev: https://pkg.go.dev/github.com/charlievieth/strcase@master
• goreportcard.com: https://goreportcard.com/report/github.com/charlievieth/strcase
• coverage service link (codecov, coveralls, etc.): https://app.codecov.io/github/charlievieth/strcase

Pull Request content

• The package has been added to the list in alphabetical order.
• The package has an appropriate description with correct grammar.
• As far as I know, the package has not been listed here before.

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Please delete one of the following lines:

• The packages around my addition still meet the Quality Standards.

Thanks for your PR, you're awesome! 😎

[github-actions]

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