Add docs for multicell + control codes #9075

Job	Run time
macOS Brew	3m 32s
macOS Brew	3m 32s
Linux (python=3.10 cc=gcc sanitize=0)	1m 38s
Linux (python=3.10 cc=gcc sanitize=0)	1m 38s
Test ./dev.sh and benchmark	2m 14s
Test ./dev.sh and benchmark	2m 14s
Bundle test (ubuntu-latest)	2m 18s
Bundle test (ubuntu-latest)	2m 18s
Linux (python=3.11 cc=gcc sanitize=1)	1m 31s
Linux (python=3.11 cc=gcc sanitize=1)	1m 31s
Bundle test (macos-latest)	3m 18s
Bundle test (macos-latest)	2m 53s
Linux package	11m 24s
Linux package	11m 24s
Linux (python=3.12 cc=clang sanitize=1)	2m 17s
Linux (python=3.12 cc=clang sanitize=1)	2m 17s
	55m 59s

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