[RFC]: Add `@stdlib/random/strided/gumbel`

### Description

This RFC proposes adding support for filling a strided array with pseudorandom numbers drawn from a Gumbel distribution. This is the strided interface analog of `@stdlib/random/base/gumbel`.

Package: `@stdlib/random/strided/gumbel`
Alias: `gumbel`

### Related Issues

None.

### Questions

No.

### Other

- A package with a similar implementation/API design is [`@stdlib/random/strided/beta`](https://github.com/stdlib-js/stdlib/tree/develop/lib/node_modules/%40stdlib/random/strided/beta).

### Checklist

- [X] I have read and understood the [Code of Conduct](https://github.com/stdlib-js/stdlib/blob/develop/CODE_OF_CONDUCT.md).
- [X] Searched for existing issues and pull requests.
- [X] The issue name begins with `RFC:`.

Start by comparing the existing @stdlib/random/strided/beta package with @stdlib/random/base/gumbel, the stated analog for this RFC. Use those packages to determine the expected package structure and API; done means @stdlib/random/strided/gumbel supports filling a strided array with pseudorandom values from a Gumbel distribution.

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