Fix sg

[minhsueh]

Fix space group parsing:

1. Centralize the use of unicodeify_spacegroup from Pymatgen.
2. Fix htmlify_spacegroup.

Note: Testing is blocked until the corresponding Pymatgen PR is merged.

[codecov-commenter]

Codecov Report

❌ Patch coverage is 50.00000% with 2 lines in your changes missing coverage. Please review.
✅ Project coverage is 73.11%. Comparing base (3f2daf4) to head (107cca6).

Files with missing lines	Patch %	Lines
...met-core/emmet/core/featurization/robocrys/util.py	50.00%	2 Missing ⚠️

❗ There is a different number of reports uploaded between BASE (3f2daf4) and HEAD (107cca6). Click for more details.

HEAD has 3 uploads less than BASE

Flag	BASE (3f2daf4)	HEAD (107cca6)
	15	12

Additional details and impacted files

@@             Coverage Diff             @@
##             main    #1501       +/-   ##
===========================================
- Coverage   85.14%   73.11%   -12.03%     
===========================================
  Files         230      152       -78     
  Lines       18900    13120     -5780     
===========================================
- Hits        16092     9593     -6499     
- Misses       2808     3527      +719     

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