Feature: Nearest Neighbour search based on search term (embed search term and find nearest neigbours)

Finding nearest neighbours based on existing points is already useful but if we could do that based on search terms too (embed search term and find nearest neighbours that would be great). Even better if we can control the distance.

This would allow more exploration of the data and seeing what a search term would produce in terms of closest matches/neighbours

No files, tests, or entry points are identified in the issue. Start by locating the existing nearest-neighbour search and embedding flows, then define how a text query and adjustable distance should work; done means a search term produces the expected closest matches and the distance can be controlled.

Written by the indexing model from the issue text.