Improve docs on functions #15614

Job	Run time
android	2m 18s
cpp_test_driver (ubuntu-22.04)	6m 36s
build_and_test (ubuntu-22.04, stable)	13m 57s
cpp_test_driver (macos-12)	7m 38s
cpp_cmake (ubuntu-22.04)	6m 24s
build_and_test (ubuntu-22.04, 1.73)	14m 48s
cpp_test_driver (windows-2022)	7m 45s
cpp_cmake (macos-12)	14m 34s
esp-idf-quick	8m 35s
build_and_test (macos-12, stable)	23m 24s
cpp_cmake (windows-2022)	9m 44s
build_and_test (windows-2022, stable)	12m 57s
build_and_test (windows-2022, 1.73)	12m 57s
ffi_32bit_build	1m 12s
fmt_test	1m 51s
build_and_test (windows-2022, beta, --exclude ffmpeg --exclude gstreamer-player)	21m 4s
mcu (pico-st7789, thumbv6m-none-eabi)	41s
mcu (stm32h735g, thumbv7em-none-eabihf)	53s
mcu_esp	2m 44s
miri	48s
node_test (ubuntu-22.04)	3m 53s
python_test (ubuntu-22.04)	2m 3s
node_test (macos-12)	12m 30s
uefi-demo	37s
updater_test (0.3.0)	1m 47s
python_test (macos-12)	2m 24s
node_test (windows-2022)	13m 49s
python_test (windows-2022)	3m 10s
docs / docs	7m 16s
tree-sitter / tree-sitter-tests	9s
wasm / wasm	4m 18s
wasm_demo / wasm_demo	20m 57s
wasm / build-slintpad	50s
wasm / lint-slintpad	28s
cpp_package_test	2m 44s
	4h 7m 45s

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