Reorganize Masonry modules #2728

Job	Run time
cargo check (msrv) (wasm32)	18s
cargo check (msrv) (windows-latest)	2m 16s
cargo check (aarch64-android)	22s
cargo clippy (windows-latest)	4m 31s
cargo check (msrv) (macos-latest)	41s
cargo check (msrv) (ubuntu-latest)	44s
cargo clippy (macos-latest)	2m 34s
cargo clippy (wasm32)	2m 1s
cargo clippy (ubuntu-latest)	3m 16s
cargo doc	1m 43s
formatting	35s
cargo miri (unsafe tree_arena)	34s
Prime LFS Cache	9s
cargo test (wasm32)	19s
typos	5s
cargo test (windows-latest)	3m 30s
cargo test (macos-latest)	2m 12s
cargo test (ubuntu-latest)	3m 20s
	29m 10s

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