🎨 Disable multiple select results for .add and .delete by fields

[sunnyosun]

MultipleResultsFound error will be raised with:

• ln.add(Entity, **kwargs)
• ln.delete(Entity, **kwargs)

Log whether .add returns an existing entry

[github-actions]

🚀 Deployed on https://63f362ac464f7c4711e9fa10--lamindb-qnwk.netlify.app

[codecov]

Codecov Report

Merging #502 (570b4d0) into main (c4ef0b9) will decrease coverage by 0.48%.
The diff coverage is 42.85%.

❗ Current head 570b4d0 differs from pull request most recent head 827b4c1. Consider uploading reports for the commit 827b4c1 to get more accurate results

@@            Coverage Diff             @@
##             main     #502      +/-   ##
==========================================
- Coverage   86.31%   85.84%   -0.48%     
==========================================
  Files          39       39              
  Lines        1323     1321       -2     
==========================================
- Hits         1142     1134       -8     
- Misses        181      187       +6     

Impacted Files	Coverage Δ
lamindb/_delete.py	67.60% <0.00%> (-5.64%)	⬇️
lamindb/dev/db/_add.py	93.85% <100.00%> (+0.75%)	⬆️
lamindb/_record.py	89.69% <0.00%> (-1.22%)	⬇️
lamindb/dev/db/_select.py	92.00% <0.00%> (-0.80%)	⬇️

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