Texture Editor Project Support

[MainMemory]

Making TextureEditor aware of projects would greatly improve usability.

• When opened with a project, both the game's texture files and the mod's texture files should be scanned and put into a list.
• The list should be searchable by filename, description (taken from our modding guides and included with the project files or built into the editor), and by searching for the name of the associated model.
• If multiple versions of a texture pack are found, you should be able to open any of them, with priority going: modded HD, modded SD, vanilla HD, vanilla SD.
• When saving, default to the appropriate folder (maybe also default to save in HD format?)