Add python interface for space-group type: moyopy.SpaceGroupType

[lan496]

Closes #52

This PR introduces moyopy.SpaceGroupType to enable python interface to access space group labels and their classifications.

from moyopy import SpaceGroupType

s = SpaceGroupType(15)  # ITA space group number (1 - 230)
assert s.hm_short == "C 2/c"
assert s.crystal_system == "Monoclinic"

print(s)
# -> PySpaceGroupType { number: 15, hm_short: "C 2/c", hm_full: "C 1 2/c 1", arithmetic_number: 8, arithmetic_symbol: "2/mC", geometric_crystal_class: "2/m", crystal_system: "Monoclinic", bravais_class: "mC", lattice_system: "Monoclinic", crystal_family: "Monoclinic" }

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 7.57576% with 122 lines in your changes missing coverage. Please review.

Project coverage is 87.85%. Comparing base (4748c80) to head (2559486).

Files with missing lines	Patch %	Lines
moyo/src/data/classification.rs	0.00%	81 Missing ⚠️
moyopy/src/data/space_group_type.rs	0.00%	40 Missing ⚠️
moyopy/src/lib.rs	0.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main      #65      +/-   ##
==========================================
- Coverage   89.74%   87.85%   -1.90%     
==========================================
  Files          44       45       +1     
  Lines        5636     5763     +127     
==========================================
+ Hits         5058     5063       +5     
- Misses        578      700     +122     

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