Diagnostic and Quickfix for `\usepackage` duplicates and ordering #1340

Job	Run time
MSRV	45s
Build (x86_64-pc-windows-msvc)	3m 30s
Build (i686-pc-windows-msvc)	4m 42s
Build (aarch64-pc-windows-msvc)	3m 24s
Build (x86_64-apple-darwin)	1m 8s
Build (aarch64-apple-darwin)	1m 12s
Build (x86_64-unknown-linux-gnu)	1m 37s
Build (aarch64-unknown-linux-gnu)	1m 54s
Build (armv7-unknown-linux-gnueabihf)	1m 27s
Build (x86_64-unknown-linux-musl)	1m 30s
	21m 9s

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