One-click exporting of Texture resources to PNG files.

• Extract to addons/texture_export
• Enable Project Settings - Plugins - Texture Export
• Right click one or more resources that inherit from Texture2D in the FileSystem and click Export as PNG
• PNGs will be created beside the resources with the same file name but PNG extension.

• Only works on resources in the FileSystem at time of writing due to limitations in Godot's API
• You may need to double click the resource in FileSystem first before export will work. Attempting to export a resource that hasn't been loaded by Godot before will result in a failed export and a warning will display in console.

• Requires Godot 4.4+