Import art/VFX asset packs + game-feel systems; normalize texture extensions to lowercase for LFS

Add BefourStudios SciFi environment packs, Gabriel Aguiar VFX, and the
ShaderCrew Toon Shader embedded packages, plus combat/enemy/wave/death
gameplay systems and supporting vault docs/screenshots.

Rename 11 vendor textures from uppercase .PNG/.HDR to lowercase so the
case-sensitive Git LFS filters (*.png/*.hdr) match on case-sensitive
filesystems (Linux CI, case-sensitive macOS), not just locally where
core.ignorecase=true masks the gap. Each .meta moved with its asset so
GUID references are preserved. All ~1000 binaries tracked via LFS.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

Assets/BefourStudios/Art/Shaders/SubG_WorldAlignSubG.shadersubgraph.meta

@@ -0,0 +1,17 @@
+fileFormatVersion: 2
+guid: fdb4c7244faa1fc4c91197dce7f05fff
+ScriptedImporter:
+  internalIDToNameTable: []
+  externalObjects: {}
+  serializedVersion: 2
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 
+  script: {fileID: 11500000, guid: 60072b568d64c40a485e0fc55012dc9f, type: 3}
+AssetOrigin:
+  serializedVersion: 1
+  productId: 330726
+  packageName: Orbital Base Environment
+  packageVersion: 1.0
+  assetPath: Assets/BefourStudios/Art/Shaders/SubG_WorldAlignSubG.shadersubgraph
+  uploadId: 782779