Improved material cleanup

• Made material cleanup more robust
• Added shader replacement mode None for people who just want to switch out to Bakery shaders or use lightmap specular

Static shader variants and bug fixes

• Add support for static shader variant generation that fixes the issue where directional lightmaps are not taken into account when a client is out of shader keywords
• Now automatically cleans up old generated materials and shaders so your Bakery/generated directory doesn't get polluted with 100's of unused materials
• Fixes for checks that prevented the adapter from functioning after upgrading Bakery
• Fixes an issue where adapted materials would not get applied correctly in game if you run conversion, then quickly begin an upload for a world before the shaders/materials fully import

Initial release of VRC Bakery Adapter

This release handles the following:

• Converting Bakery materials into a format consumable by VRChat
• Patching Bakery shaders for VRC compatibility
• Batch replacing Standard shaders with Bakery Standard shaders