Porting to renderer-v2 resources (instead of dedicated)

[Adnn]

End goal is to only depend on resources from renderer-v2 folder, not a dedicated snacman folder.

• Handle the very noisy "error missing texture"
  • Currently gated behind a shader "NAIVE_TEXTURE" define
• Restore shader recompilation (currently, the button only works for the text feature, taken from V1).
• Understand why shaders are thresholding
• Obtain missing normal maps, or actually define those features "per model" (we have the functionality in .sew files atm)
• Port the shaders (i.e. keep a dedicate "TEXT_V1" subfolder, but ensure all "TO_PORT" features are in main shader. See the .md files keeping track of some diff on desktop).