chore(doc): Add docs for `assert_max_bit_size` #2977

Job	Run time
build-nargo	2m 21s
build-acvm-js	4m 21s
build-noirc-abi	4m 23s
ACVM JS (Node.js)	42s
ACVM JS (Browser)	1m 42s
build-noir-wasm	2m 22s
Noir JS	1m 34s
noir-js-backend-barretenberg	43s
noirc_abi	44s
noir_codegen	59s
Integration Tests	9m 55s
noir_wasm	1m 10s
End	1s
	30m 57s

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