type-sitter-proc: generate type-sitter wrappers via procedural macros

See type-sitter for more information. This provides procedural macros which will generate typed node wrappers. However, it's highly recommended to use type-sitter-cli instead, as it's more tested and will give your IDE at least as good inference.

If a project depends on this (and as with type-sitter-cli), it must also depend on type-sitter-lib and tree-sitter.

Note that you can't generate multiple node-type or query wrappers in the same module, due to the fact that they will each generate their own submodules with the same name. You have to put the wrapper-generating macros in separate modules and then pub use the generated definitions. Sorry!