The faster `cargo nextest` currently doesn't support running the doctests.
Thus, add an additional step for them with cargo's default test runner.
- Fix doctests for the `nu-pretty-hex` crate
* kind of works but not what we really want
* updated `into binary` and `first` to work better together
* attempt to fix wasm build problem
* attempt #2 to fix wasm stuff
* add nu-pretty-hex, add into binary, update binaryview
* updated parameter name, updated examples
* fixed nu-pretty-hex test
* fixed tests again! and added a no color option to pretty-hex