Add support for a font-metrics property to Text/TextInput. #17471

Job	Run time
python_test (ubuntu-22.04)	1m 49s
node_test (ubuntu-22.04)	2m 54s
build_and_test (ubuntu-22.04, 1.77)	12m 42s
python_test (macos-12)	1m 46s
build_and_test (macos-12, stable)	27m 30s
python_test (windows-2022)	2m 9s
cpp_cmake (macos-12, 1.77)	12m 3s
build_and_test (windows-2022, stable)	14m 49s
cpp_cmake (windows-2022, nightly)	8m 19s
node_test (macos-12)	4m 0s
build_and_test (windows-2022, 1.77)	14m 41s
cpp_cmake (ubuntu-22.04, stable)	6m 35s
node_test (windows-2022)	4m 37s
cpp_test_driver (ubuntu-22.04)	6m 27s
build_and_test (windows-2022, beta, --exclude ffmpeg --exclude gstreamer-player)	14m 47s
build_and_test (ubuntu-22.04, nightly)	10m 0s
mcu_esp	2m 26s
mcu (pico-st7789, thumbv6m-none-eabi)	35s
cpp_test_driver (macos-12)	6m 46s
mcu (stm32h735g, thumbv7em-none-eabihf)	41s
vsce_build_test	5m 5s
cpp_test_driver (windows-2022)	8m 4s
android	1m 38s
esp-idf-quick	8m 39s
ffi_32bit_build	1m 8s
fmt_test	1m 31s
updater_test (0.3.0)	1m 33s
miri	45s
docs / docs	6m 55s
tree-sitter / tree-sitter-tests	12s
wasm / wasm	3m 52s
wasm_demo / wasm_demo	2m 21s
wasm / lint-slintpad	28s
wasm / build-slintpad	51s
cpp_package_test	3m 6s
	3h 21m 44s

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