[FR] Support FramesView `annotate` method

[Guydada]

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Proposal Summary

Support annotate for FramesView.

Motivation

• The use case: I have a large videos dataset that uses as a main data repository. For training different YOLO variations, I use the to_frames function to create a FramesView. From here, I would like to annotate only those frames and load them back to the FramesView.
• This is a usable feature - it allows to create complex continuous data repositories that contains videos, but annotate only some frames.
• We have a lot of video data collected, but we mostly need to annotate only some of it, while keeping the rest of the data stored.
• Currently, I workaround this by creating a temp dataset, adding the frames to it and then annotating it separately.

What areas of FiftyOne does this feature affect?

• [ ] App: FiftyOne application
• [x] Core: Core fiftyone Python library
• [ ] Server: FiftyOne server

Details

It seems to be not too complicated to implement, and there is even a mention of it near the relevant code

Willingness to contribute

The FiftyOne Community welcomes contributions! Would you or another member of your organization be willing to contribute an implementation of this feature?

• [ ] Yes. I can contribute this feature independently
• [x] Yes. I would be willing to contribute this feature with guidance from the FiftyOne community
• [ ] No. I cannot contribute this feature at this time

[evatt-harvey-salinger]

Just re-emphasizing this request! Video datasets need some love when it comes to annotation. Documented another use case from this in #4397.