Display custom NSCF kpoint distance

[AndresOrtegaGuerrero]

This allows the PDOS plugin to use the custom NSCF k-point distance for display.

[edan-bainglass]

LGTM!

[superstar54]

LGTM!

[codecov]

Codecov Report

Attention: Patch coverage is 90.00000% with 1 line in your changes missing coverage. Please review.

Project coverage is 72.28%. Comparing base (807ca9d) to head (ddd5768).
Report is 3 commits behind head on main.

Files with missing lines	Patch %	Lines
src/aiidalab_qe/plugins/pdos/model.py	88.88%	1 Missing ⚠️

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #1345   +/-   ##
=======================================
  Coverage   72.27%   72.28%           
=======================================
  Files          99       99           
  Lines        6892     6894    +2     
=======================================
+ Hits         4981     4983    +2     
  Misses       1911     1911           

Flag	Coverage Δ
python-3.11	72.26% <90.00%> (+<0.01%)	⬆️
python-3.9	72.31% <90.00%> (+<0.01%)	⬆️

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