feat(index): allow passing negative limits for find method

[vkrishnamurthy11]

No description provided.

[codecov]

Codecov Report

Patch coverage: 33.33% and project coverage change: +51.89% 🎉

Comparison is base (a39c4f9) 30.06% compared to head (e56bdaf) 81.95%.

Additional details and impacted files

@@             Coverage Diff             @@
##             main    #1745       +/-   ##
===========================================
+ Coverage   30.06%   81.95%   +51.89%     
===========================================
  Files         133      134        +1     
  Lines        8731     8841      +110     
===========================================
+ Hits         2625     7246     +4621     
+ Misses       6106     1595     -4511     

Flag	Coverage Δ
docarray	81.95% <33.33%> (+51.89%)	⬆️

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Files Changed	Coverage Δ
docarray/index/backends/hnswlib.py	73.99% <33.33%> (+73.99%)	⬆️

... and 109 files with indirect coverage changes

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[jupyterjazz]

Hi @vkrishnamurthy11, this looks good, I think get_current_count is a reasonable way to get the number without touching the sql table.

Can you please add tests and implement this functionality for other backends too?