Add initial implementation of `meta` compilation #2922

Job	Run time
cargo check no std	1m 30s
cargo check no std	1m 30s
Rustfmt	1m 8s
Rustfmt	1m 8s
resources/scripts/ots_test.sh	1m 13s
resources/scripts/ots_test.sh	1m 13s
Build GS and check the result	2m 23s
Build GS and check the result	2m 20s
Clippy lints	1m 43s
Clippy lints	1m 43s
cargo test fea-rs	1m 1s
cargo test fea-rs	1m 1s
fontbe tests	1m 8s
fontbe tests	1m 8s
fontc tests	1m 13s
fontc tests	1m 13s
tests other than fontbe,fontc	2m 11s
tests other than fontbe,fontc	2m 11s
	26m 57s

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