Many Improvements

[aindlq]

Batch Image Processing

Added a new endpoint /index/images/batch for processing multiple images in a single request

1. Implemented multi-threaded processing (20 threads, hardcoded for now) for better performance
2. Returns detailed status for each image in the batch
3. Batch Tag Addition
4. Automatically writes indices to disk after batch operations

Added support for the file:// URL scheme in image URLs

1. Allows loading images from the local filesystem via file:// url
2. Works with both individual image indexing and search operations

for usage example see https://gist.github.com/aindlq/c7410d52ae0016aedb5b236f2f40be45

[aindlq]

Not ready for merge, need to be cleaned up and documented.

[lklic]

Hi @aindlq, I am getting build errors on this. I haven't dug too much into it, as I think the PR is not complete.