Refactor tiling

[k-dominik]

In order to make it easier to extend tiling and also track changes this PR separates Tiling and TileProvider classes.

The only addition here is the test for Data2Scene transformation in tiling.

[codecov]

Codecov Report

Attention: 57 lines in your changes are missing coverage. Please review.

Comparison is base (5d4d855) 36.30% compared to head (0cbc945) 36.28%.

Files	Patch %	Lines
volumina/tiling/tileprovider.py	76.89%	55 Missing ⚠️
volumina/tiling/tiling.py	96.66%	2 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #311      +/-   ##
==========================================
- Coverage   36.30%   36.28%   -0.02%     
==========================================
  Files         106      108       +2     
  Lines       11492    11489       -3     
==========================================
- Hits         4172     4169       -3     
  Misses       7320     7320              

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[btbest]

Doesn't change any actual logic as far as I can tell so looks good. More tests are good tests as well.