Add extended storage image formats

[ArthurVasseur]

• Register float and normalized storage image formats (r32f, rg32f, rg16f, r16f, r11f_g11f_b10f, rgba16, rgb10_a2, rg16, rg8, r16, r8 and their snorm variants)
• GLSL: reject extended formats when targeting GLSL ES

[codecov]

Codecov Report

❌ Patch coverage is 47.82609% with 12 lines in your changes missing coverage. Please review.
✅ Project coverage is 81.36%. Comparing base (7dd436c) to head (086713f).

Files with missing lines	Patch %	Lines
src/NZSL/SpirV/SpirvConstantCache.cpp	25.00%	12 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #102      +/-   ##
==========================================
- Coverage   81.40%   81.36%   -0.05%     
==========================================
  Files         150      150              
  Lines       19168    19191      +23     
==========================================
+ Hits        15603    15614      +11     
- Misses       3565     3577      +12     

Files with missing lines	Coverage Δ
src/NZSL/GlslWriter.cpp	84.33% <100.00%> (+0.01%)	⬆️
src/NZSL/SpirvWriter.cpp	88.43% <100.00%> (+0.08%)	⬆️
src/NZSL/SpirV/SpirvConstantCache.cpp	85.86% <25.00%> (-1.18%)	⬇️

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[SirLynix]

LGTM, thank you!