* Added escaping to ActiveEnum to allow for non-Unicode Standard Annex #31 characters, as well as addressing issues with ' ' and '_' causing potential identifier conflicts.
* Improved docstring for camel_case_with_escaped_non_xid.
* Moved underscore prepending to camel_case_with_escaped_non_xid.
* cargo fmt and code fixes to resolve CI failures.
* Added unittest to sea_orm_macros::util for new function.
* Fixed a typo in a doc code block.
* clippy
* Test cases
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Co-authored-by: Billy Chan <ccw.billy.123@gmail.com>