Omnitils

Refactor

- **enums,fetch,files**: Reworked enums classes, StrEnum -> StrConstant, fixed logic dealing with resuming file downloads, added new schema "ArbitrarySchema"

Fix

- **unify_schemas**: Retrieve schema attributes using getattr

Fix

- **unify_schema**: Incorrect variable used for checking if for 'use_value' key, added support for single string priority key

Refactor

- **schema**: Introduce utility func for joining schemas

Refactor

- **schemas**: Add PriorityMap type

Feat

- **api,fetch**: Multiple new utilities added to gdrive and download modules, implemented some major rewrites to improve clarity and modularity

Refactor

- **api/github**: Minor syntax changes
- **files/_core**: Rewrite `get_temporary_file`
- **fetch/_core**: New `get_new_session` util for creating basic session object