Problem: Allowing undocumented "secret" (sub)captures makes it harder
to write comprehensive colorschemes and catch inconsistent captures.
Solution: Only allow captures listed in CONTRIBUTING.md. Add useful
(cross-language) subcaptures and drop language-specific or too niche
ones.
Follow-up: Adding further `*.builtin` captures and changing queries to
use them.
Language-specific subcaptures should instead be added in user config or
a custom language plugin.
This change replaces the slint parser written and maintained by @jrmoulton
with the official one hosted in the slint-ui organization on github.
A huge thank you to @jrmoulton for all his work on the tree-sitter
parser!
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Co-authored-by: jrmoulton <jaredmoulton3@gmail.com>
