* Add clipspace feature.
* feat: copy content to clipspace
* feat: paste content from clipspace

Extend validation to allow for validating annotated_path in addition to other parameters.

Add support for annotated_filepath in folder_paths function.

Generalize the '/upload/image' API to allow for uploading images to the 'input', 'temp', or 'output' directories.

* rename contentClipboard -> clipspace

* Do deep copy for imgs on copy to clipspace.

* add original_imgs into clipspace
* Preserve the original image when 'imgs' are modified

* robust patch & refactoring folder_paths about annotated_filepath

* Only show the Paste menu if the ComfyApp.clipspace is not empty

* instant refresh on paste

force triggering 'changed' on paste action

* subfolder fix on paste logic

attach subfolder if subfolder isn't empty

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Co-authored-by: Lt.Dr.Data <lt.dr.data@gmail.com>