geometry buffer docs + api improvements #5447

Job	Run time
Documentation CI	6m 40s
Rustfmt CI	14s
Project Manager	3m 18s
Clippy CI	1m 35s
Project Template (Android)	18m 28s
Project Template (PC)	19m 11s
Project Template (WASM)	12m 27s
Tests CI (stable, ubuntu-latest)	8m 49s
Wasm CI (stable)	1m 25s
Tests CI (stable, windows-latest)	16m 4s
Tests CI (stable, macos-latest)	7m 1s
	1h 35m 12s

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