[LoRA] quality of life improvements in the loading semantics and docs (#3180)
* 👽 qol improvements for LoRA.
* better function name?
* fix: LoRA weight loading with the new format.
* address Patrick's comments.
* Apply suggestions from code review
Co-authored-by: Patrick von Platen <patrick.v.platen@gmail.com>
* change wording around encouraging the use of load_lora_weights().
* fix: function name.
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Co-authored-by: Patrick von Platen <patrick.v.platen@gmail.com>