Essential 2D Shaders Updated to v5.0.0!

The Essential 2D Shaders have been updated to version 5.0.0! The following has changed:

1. Directional Dissolve Shader:

• Shader now uses the Reconstructed 2D Lit Shader instead of its own duplicate.

2. Lava Shader:

• Shader now uses the Reconstructed 2D Lit Shader instead of its own duplicate.
• Removed obsolete secondary emission settings (had no effect previously) and changed the reference names of the shader's emission properties:
• _PrimaryEmissionColor is now _EmissionColor.
• _EmissionMapPrimary is now _EmissionMap.
• _PrimaryEmissionExtraIntensity is now _EmissionExtraIntensity.
• Fixed Universal Renderer version not always moving the lava correctly.
• Removed redundant nodes in the Shader Graph asset.
• Fixed the Universal Renderer demo scene using the 2D Renderer post-processing profile.

3. Vertex Displacement Shader:

• Shader now uses the Reconstructed 2D Lit Shader instead of its own duplicate.
• Fixed the Universal Renderer demo scene using the 2D Renderer post-processing profile.
• Made the shader transparent to fix objects becoming invisible on Unity 2022.x.

4. Dual Emission Shader:

• Made the shader transparent to fix objects becoming invisible on Unity 2022.x.

5. Image Highlight Shader:

• Made the shader transparent to fix objects becoming invisible on Unity 2022.x.

6. Fullscreen Pulse Shader:

• Fixed the fullscreen custom renderer feature breaking on Unity 2022.2.0 (2D Renderer). See issue UUM-14400 on the Unity issue tracker for more information.

7. Misc:

• Reworked package file organization to make included shaders self-contained and easier to import and export.
• Removed texture duplicates between the 2D Renderer and Universal Renderer versions of some shaders.
• Included individual demo scenes for each shader.
• All shaders now share the same structure and are self-contained, meaning that individual shaders can be imported separately without introducing asset import conflicts.
• Reduced package size by ~25%.