Add docs

Author: the-mikedavis

book/src/SUMMARY.md

@@ -28,3 +28,4 @@
   - [Adding textobject queries](./guides/textobject.md)
   - [Adding indent queries](./guides/indent.md)
   - [Adding injection queries](./guides/injection.md)
+  - [Adding rainbow bracket queries](./guides/rainbow_bracket_queries.md)

book/src/editor.md

@@ -61,6 +61,7 @@
 | `end-of-line-diagnostics` | Minimum severity of diagnostics to render at the end of the line. Set to `disable` to disable entirely. Refer to the setting about `inline-diagnostics` for more details | "disable"
 | `clipboard-provider` | Which API to use for clipboard interaction. One of `pasteboard` (MacOS), `wayland`, `x-clip`, `x-sel`, `win-32-yank`, `termux`, `tmux`, `windows`, `termcode`, `none`, or a custom command set. | Platform and environment specific. |
 | `editor-config` | Whether to read settings from [EditorConfig](https://editorconfig.org) files | `true` |
+| `rainbow-brackets` | Whether to render rainbow colors for matching brackets. Requires tree-sitter `rainbows.scm` queries for the language. | `false` |
 
 ### `[editor.clipboard-provider]` Section