Implement Syncback to support converting Roblox files to a Rojo project #1834

Job	Run time
Rustfmt, Clippy, Stylua, & Selene	55s
Check MSRV	47s
Build and Test (ubuntu-latest)	1m 5s
Build and Test (windows-latest)	2m 47s
Build and Test (macos-latest)	1m 15s
	6m 49s

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