Add methods to MasonryState to allow external renderer #2834

Job	Run time
cargo check (aarch64-android)	23s
cargo check (msrv) (wasm32)	19s
cargo check (msrv) (windows-latest)	1m 43s
cargo check (msrv) (macos-latest)	32s
cargo clippy (windows-latest)	4m 42s
cargo check (msrv) (ubuntu-latest)	37s
cargo clippy (wasm32)	1m 43s
cargo clippy (macos-latest)	1m 47s
cargo doc	40s
cargo clippy (ubuntu-latest)	3m 10s
cargo miri (unsafe tree_arena)	34s
formatting	34s
Prime LFS Cache	3s
cargo test (wasm32)	24s
typos	7s
cargo test (windows-latest)	2m 53s
cargo test (macos-latest)	1m 43s
cargo test (ubuntu-latest)	2m 52s
	24m 46s

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