feat!: signature file grammar #307

Job	Run time
Fuzz fsharp signature	1m 16s
Parse examples (ubuntu-latest)	3m 55s
Fuzz fsharp	1m 14s
Test Go binding (ubuntu-latest)	10s
Parse examples (macos-14)	3m 55s
Test Go binding (windows-latest)	1m 35s
Test Node binding (ubuntu-latest)	14s
Test Go binding (macos-latest)	13s
Test Node binding (macos-latest)	49s
Test parser (ubuntu-latest)	14s
Test Python binding (ubuntu-latest)	15s
Test parser (windows-latest)	36s
Test Python binding (windows-latest)	1m 5s
Test parser (macos-14)	24s
Test Rust binding (ubuntu-latest)	12s
Test Swift binding (ubuntu-latest)	46s
Test Python binding (macos-latest)	22s
Test Rust binding (windows-latest)	1m 33s
Test Swift binding (macos-latest)	19s
Test Rust binding (macos-latest)	25s
	19m 32s

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