[Feature]: Add `clone` to `buffer` fields

[jonbarrow]

Checked Existing

• I have checked the repository for duplicate issues.

What feature do you want to see added?

Add the clone option to buffer fields

Why do you want to have this feature?

Feature parity with binary-parser

Any other details to share? (OPTIONAL)

Right now all buffer fields are clones. The docs for clone however are:

clone - (Optional, defaults to false) By default, buffer(name [,options]) returns a new buffer which references the same memory as the parser input, but offset and cropped by a certain range. If this option is true, input buffer will be cloned and a new buffer referencing a new memory region is returned.