Add parser submodule #2807

Job	Run time
b2-windows (windows-2019)	28m 58s
b2-posix (ubuntu-20.04)	14m 14s
b2-windows (windows-2022)	33m 19s
cmake-install-posix (ubuntu-20.04)	4m 38s
b2-posix (ubuntu-22.04)	14m 20s
cmake-install-windows (windows-2019)	12m 14s
cmake-install-posix (ubuntu-22.04)	6m 46s
b2-posix (ubuntu-24.04)	14m 17s
cmake-install-windows (windows-2022)	9m 15s
cmake-install-posix (ubuntu-24.04)	5m 51s
b2-posix (macos-13)	34m 46s
cmake-test-posix (ubuntu-latest)	2m 16s
cmake-install-posix (macos-13)	8m 50s
b2-posix (macos-14)	12m 45s
cmake-install-posix (macos-14)	6m 36s
b2-posix (macos-15)	10m 53s
cmake-test-posix-quick (ubuntu-20.04)	1m 50s
cmake-install-posix (macos-15)	6m 12s
cmake-test-windows-quick (windows-2019)	5m 55s
cmake-test-posix-quick (ubuntu-22.04)	2m 2s
cmake-test-windows-quick (windows-2022)	4m 50s
cmake-test-posix-quick (ubuntu-24.04)	2m 18s
cmake-test-posix-quick (macos-13)	6m 8s
cmake-test-posix-quick (macos-14)	4m 44s
cmake-test-posix-quick (macos-15)	5m 25s
	4h 19m 22s

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