[Add] All in one shader

Assets/Plugins/AllIn1SpriteShader/Shaders/LitShaders/README.txt

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+# BetterShaders_AllIn1Sprite Shader
+
+This shader was created using Better Shaders, a Unity asset by Jason Booth that simplifies cross-pipeline shader development.
+
+## Usage
+- If you own Better Shaders: You can modify the shader's source code: AllIn1SpriteShaderLit_BetterShader.surfshader
+- If you don't own Better Shaders: A pre-compiled version matching your current Render Pipeline and Unity version will be automatically set up.
+
+## Why Better Shaders?
+Better Shaders was used because Unity doesn't have an easy way to create hand written lit shaders compatible across all render pipelines.
+
+## About Better Shaders
+Better Shaders streamlines shader creation by:
+- Enabling Unity-like shader writing
+- Auto-compiling for various pipelines
+- Allowing shader stacking
+- Functioning like native Unity shaders
+
+For more information or to purchase Better Shaders, visit:
+[Better Shaders on Unity Asset Store](https://assetstore.unity.com/packages/tools/visual-scripting/better-shaders-2022-standard-urp-hdrp-244057)
+
+## What are all the .txt shaders and how to export them?
+The .txt shaders are the pipeline-specific source code for the shader. You can export them by:
+1. Selecting AllIn1SpriteShaderLit_BetterShader.surfshader
+2. Export all shaders as text assets
+
+Doing this will cause some URP and HDRP shaders material inspectors properties to be in the incorrect order. To fix this, you can:
+1. Localize the Better Shaders2022 folder
+2. Inside you'll see the PipelineTemplates folder
+3. There, find your pipeline's template
+4. Make sure that "%PROPERTIES%" is right under "Properties{"