Add material migrator

[orels1]

Currently there is a way to migrate from old ORL Shaders to new ORL Shaders

I should add a way to migrate from Standard to ORL easily.

I could use the same logic, but it is currently a bit too aggressive. Preferably it should allow you to:

• Migrate the whole project
• Migrate all materials in the current scene
• Migrate manually selected materials
• Detect Standard blending mode (opaque, cutout, transparent) to map to correct shaders