feat: Custom keyword validation #1089

Job	Run time
Build on wasm32-unknown-unknown	22s
Generic pre-commit checks	26s
Run test coverage	1m 5s
Verify commit messages	39s
Rustfmt	12s
Test draft201909 (stable) on ubuntu-22.04	1m 0s
Python 3.7 on ubuntu-22.04	1m 59s
Clippy	38s
Test draft202012 (stable) on ubuntu-22.04	1m 1s
Python 3.8 on ubuntu-22.04	1m 26s
Test draft201909 (stable) on macos-12	2m 29s
Python 3.9 on ubuntu-22.04	1m 30s
Test draft202012 (stable) on macos-12	2m 57s
Python 3.10 on ubuntu-22.04	1m 42s
Check features	1m 1s
Test draft201909 (stable) on windows-2022	3m 27s
Python 3.11 on ubuntu-22.04	1m 24s
Python 3.12 on ubuntu-22.04	1m 32s
Test draft202012 (stable) on windows-2022	3m 28s
Python 3.7 on macos-12	3m 44s
Python 3.8 on macos-12	3m 20s
Python 3.9 on macos-12	2m 58s
Python 3.10 on macos-12	2m 18s
Python 3.11 on macos-12	2m 7s
Python 3.12 on macos-12	2m 55s
Python 3.7 on windows-2022	4m 18s
Python 3.8 on windows-2022	4m 0s
Python 3.9 on windows-2022	4m 1s
Python 3.10 on windows-2022	3m 35s
Python 3.11 on windows-2022	3m 52s
Python 3.12 on windows-2022	2m 55s
	1h 8m 21s

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