Align default containers with jax

[janosg]

Currently we have only list, dict and tuple as default pytree containers.

Jax also has:

• None
• collections.namedtuple and typing.NamedTuple
• collections.OrderedDict

[codecov]

Codecov Report

Merging #14 (83db5e1) into main (7108cf7) will increase coverage by 1.76%.
The diff coverage is 96.59%.

@@            Coverage Diff             @@
##             main      #14      +/-   ##
==========================================
+ Coverage   93.54%   95.30%   +1.76%     
==========================================
  Files           7        9       +2     
  Lines         372      405      +33     
==========================================
+ Hits          348      386      +38     
+ Misses         24       19       -5     

Impacted Files	Coverage Δ
src/pybaum/registry_entries.py	88.40% <88.88%> (+5.73%)	⬆️
src/pybaum/registry.py	100.00% <100.00%> (ø)
src/pybaum/tree_util.py	94.85% <100.00%> (+0.03%)	⬆️
src/pybaum/typecheck.py	100.00% <100.00%> (ø)
tests/test_tree_util.py	100.00% <100.00%> (ø)
tests/test_typecheck.py	100.00% <100.00%> (ø)

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[tobiasraabe]

Great! 🎉