* docs: fix grammar and typos in comments and documentation
* docs: use British English style for e.g. and i.e. (no trailing comma)
Changed from American English style (e.g.,) to British English style (e.g.)
for consistency with the rest of the codebase."
* add a default head method through eval
* remove the old document trait
* implement document for each platform
* pull out document into a dedicated crate to cut down on shared dependencies
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Co-authored-by: Jonathan Kelley <jkelleyrtp@gmail.com>