change dvc.params to work with files

[PythonFZ]

• remove old functionality from dvc.params to map zn.params
• use dvc.params to add files as parameters.

TODO

• Update documentation
• tests

[codecov]

Codecov Report

Merging #276 (98fa1f3) into main (4864775) will decrease coverage by 0.03%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##             main     #276      +/-   ##
==========================================
- Coverage   71.28%   71.24%   -0.04%     
==========================================
  Files          27       27              
  Lines        1191     1193       +2     
  Branches      237      238       +1     
==========================================
+ Hits          849      850       +1     
- Misses        316      317       +1     
  Partials       26       26              

Flag	Coverage Δ
unittests	71.24% <100.00%> (-0.04%)	⬇️

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
zntrack/core/jupyter.py	23.80% <ø> (ø)
zntrack/core/dvcgraph.py	68.35% <100.00%> (+1.03%)	⬆️
zntrack/dvc/__init__.py	100.00% <100.00%> (+2.22%)	⬆️
zntrack/utils/serializer.py	76.05% <0.00%> (-2.82%)	⬇️

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