Meson

tree-sitter: introduce tree-sitter, add nix grammar #1527

Job	Run time
nix-build-develop-clang (none, release, true)	4m 17s
nix-build-develop-clang (none, release, false)	6m 5s
nix-build-develop-clang (none, debug, true)	3m 49s
nix-build-develop-clang (none, debug, false)	5m 27s
nix-build-develop-gcc (none, release, true)	4m 44s
nix-build-develop-gcc (none, release, false)	5m 45s
nix-build-develop-gcc (none, debug, true)	5m 29s
nix-build-develop-gcc (none, debug, false)	6m 8s
nix-build-develop-gcc (undefined, release, true)	9m 56s
nix-build-develop-gcc (undefined, release, false)	9m 49s
nix-build-develop-gcc (undefined, debug, true)	5m 37s
nix-build-develop-gcc (undefined, debug, false)	6m 52s
	1h 13m 58s

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