🚸 ln.Folder becomes ln.Tag & directories now modeled as prefixes (as on S3)

[falexwolf]

• 🚚 Repurpose Folder to Tag lnschema-core#209

[codecov]

Codecov Report

Merging #794 (3ead710) into main (0e1fbb4) will decrease coverage by 0.61%.
The diff coverage is 93.97%.

❗ Current head 3ead710 differs from pull request most recent head 2b60b36. Consider uploading reports for the commit 2b60b36 to get more accurate results

@@            Coverage Diff             @@
##             main     #794      +/-   ##
==========================================
- Coverage   78.52%   77.92%   -0.61%     
==========================================
  Files          33       31       -2     
  Lines        1779     1712      -67     
==========================================
- Hits         1397     1334      -63     
+ Misses        382      378       -4     

Impacted Files	Coverage Δ
lamindb/__init__.py	100.00% <ø> (ø)
lamindb/_file_access.py	70.83% <75.00%> (-1.59%)	⬇️
lamindb/_file_methods.py	90.76% <93.47%> (+0.44%)	⬆️
lamindb/_baseorm_methods.py	75.67% <100.00%> (+1.60%)	⬆️
lamindb/_file.py	91.89% <100.00%> (+0.75%)	⬆️
lamindb/dev/storage/_backed_access.py	76.09% <100.00%> (ø)

... and 2 files with indirect coverage changes

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[github-actions]

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