Locals will be the main interface to treesitter, through some functions:
get_definitions(bufnr) : returns all the definitions in bufnr
get_scopes(bufnr): returns all definitions in bufnr
get_references(bufnr): returns all references in bufnr
The `parsers` module manages parsers for us, for now only in a really
basic way.
iter_prepared_mathes iters on an enhanced versions of the matches, where
captures are directly accessible via their names to allow things like :
((itentifier) @def.first (identifier) @def.last)
To be handled like this in lua:
match.def.first
match.def.last
Also adds a `set!` predicate to allow setting data within the prepared
match (see queries/lua/locals.scm) for examples.
