Implement search for segments and groups

[philippotto]

Implement search for segments and groups in the segments tab (similar to the skeleton tab).

URL of deployed dev instance (used for testing):

• https://___.webknossos.xyz

Steps to test:

• open an annotation
• create many segments (e.g., by clicking on various segments on an existing segmentation layer)
• name some segments
• use the new search button to search for segments and use the jump feature

Issues:

• fixes Search in segment list #7167

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• Updated changelog

[MichaelBuessemeyer]

Works very very nicely.

I like the idea of extending the type of the searchKey for the search popover.
I just added one suggestion that you may apply or ignore.

Additional thanks for getting rid of the ts error 🚀