[CloudeaSoft]

Noise and heatmap textures have inconsistent names, duplicate copies across modules, and several files whose encoding does not match their extension. This PR cleans up that asset subset and updates its references.

Closes: #320 (noise and heatmap textures only).

Changes

• Normalize 253 texture names using consistent casing and underscore word boundaries, preserving existing words, spelling, and numbers.
• Move 7 shared textures into Function and remove 33 byte-identical duplicates. Update generated asset references and explicit or dynamically constructed paths.
• Remove unused noise and heatmap parameter bindings and declarations from GrayFlow and the furnace lava-window shader. Shader sampling and color calculations are unchanged.
• Re-encode 12 JPEG-backed .png files as PNG and 2 PNG-backed .bmp files as BMP. File paths, dimensions, and ImageSharp-decoded RGBA pixels are preserved.

Unused asset candidates are retained. The existing Acropora texture bindings are also preserved.

Validation

• dotnet build /p:WarningLevel=0 passed with 0 errors and existing ImageSharp vulnerability warnings.
• dotnet test --no-build --no-restore --verbosity normal /p:WarningLevel=0: 583 tests passed.
• Verified exact-byte renames and duplicate removal, decoded pixel equality for format conversions, resource manifest paths, stale references, UTF-8 BOM checks, and git diff --check.
• In-game rendering and world generation have not been exercised.