Reorganize Masonry modules #2730

Job	Run time
cargo check (msrv) (wasm32)	16s
cargo clippy (windows-latest)	35s
cargo check (msrv) (windows-latest)	1m 35s
cargo check (aarch64-android)	34s
cargo clippy (macos-latest)	33s
cargo check (msrv) (macos-latest)	48s
cargo clippy (ubuntu-latest)	34s
cargo clippy (wasm32)	2m 3s
cargo check (msrv) (ubuntu-latest)	40s
cargo doc	43s
formatting	36s
cargo miri (unsafe tree_arena)	35s
Prime LFS Cache	4s
cargo test (wasm32)	19s
typos	7s
cargo test (windows-latest)	3m 0s
cargo test (macos-latest)	1m 49s
cargo test (ubuntu-latest)	3m 23s
	18m 14s

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