[Feat] pHash tracing

[lmmx]

A very cool feature would be to allow ‘tracing’ an image via perceptual hash

The idea would be:

• break it down into grid sized chunks
• try ‘overlaying’ every shape (i.e. no shape, square, circle, …)
• select the one that minimises the pHash

This would be expected to work well for simple geometric objects, e.g. text