Scene parser add shadow parser

[gz65555]

Please check if the PR fulfills these requirements

• The commit message follows our guidelines
• Tests for the changes have been added (for bug fixes / features)

[codecov-commenter]

Codecov Report

Patch coverage has no change and project coverage change: -0.04 ⚠️

Comparison is base (9b68d68) 40.85% compared to head (83d75d0) 40.81%.

❗ Current head 83d75d0 differs from pull request most recent head f625330. Consider uploading reports for the commit f625330 to get more accurate results

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Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1411      +/-   ##
==========================================
- Coverage   40.85%   40.81%   -0.04%     
==========================================
  Files         350      350              
  Lines       17772    17783      +11     
  Branches     2587     2592       +5     
==========================================
- Hits         7260     7258       -2     
- Misses       9876     9888      +12     
- Partials      636      637       +1     

Impacted Files	Coverage Δ
packages/core/src/particle/ParticleRenderer.ts	3.54% <0.00%> (-0.05%)	⬇️
packages/loader/src/SceneLoader.ts	8.16% <0.00%> (-1.14%)	⬇️

... and 1 file with indirect coverage changes

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