:sparkles: Add DICOM VL WSI Writer

[John-P]

• [x] Add minimal writer
• [ ] Add tests
• [ ] Add support for other codecs (JPEG2000, JPEG-LS)
• [ ] Transcode / repack support

[codecov[bot]]

Codecov Report

Merging #79 (a9b4ff7) into dev (ff21d85) will increase coverage by 0.86%. The diff coverage is 93.49%.

@@            Coverage Diff             @@
##              dev      #79      +/-   ##
==========================================
+ Coverage   89.82%   90.69%   +0.86%     
==========================================
  Files          12       13       +1     
  Lines        1347     1752     +405     
==========================================
+ Hits         1210     1589     +379     
- Misses        137      163      +26     

Impacted Files	Coverage Δ
wsic/cli.py	92.85% <ø> (ø)
wsic/codecs.py	77.77% <ø> (ø)
wsic/utils.py	95.53% <ø> (ø)
wsic/enums.py	88.53% <45.45%> (-7.06%)	:arrow_down:
wsic/readers.py	88.71% <90.90%> (+0.07%)	:arrow_up:
wsic/dicom.py	96.30% <96.30%> (ø)
wsic/writers.py	86.76% <96.66%> (+0.74%)	:arrow_up:

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