Improve Markdown highlighting (#37669)
Release Notes:
- Improved Markdown syntax highlighting
PR #25330 raised concerns about breaking changes, so I split it into two
PRs:
- This PR improves highlighting without deprecating existing selectors.
- PR #37670 is based on this PR and introduces new Markdown selectors.
| Zed 0.202.7 | With this PR |
| --- | --- |
| <img width="800" height="1080" alt="md-0 202 7"
src="https://github.com/user-attachments/assets/0b0b5920-32ed-454f-bc3b-bf5cd0a9086a"
/> | <img width="800" height="1080" alt="md-pr"
src="https://github.com/user-attachments/assets/a5923a2e-391e-4e09-a60b-1a142f9378f3"
/> |
Changes to include the `markup` selector, conforming to
[Neovim](38e46a6d7a/queries/markdown/highlights.scm (L59)),
[VS
Code](dfad570d15/extensions/markdown-basics/syntaxes/markdown.tmLanguage.json (L60)),
[Atom](6686ac6ccc/grammars/gfm.json (L147)),
and [Zed
itself](1e255e41cc/crates/languages/src/gitcommit/highlights.scm (L1)).
- `paragraph`, `indented_code_block`, `pipe_table`: `text`
- `# Heading`: `title` -> `title.markup`
- `-`, `1.`, `>`, `|`: `punctuation.markup`
- ```` ``` ````: `punctuation.embedded.markup`
- `[1]: url.com`, `[link](url.com)`: `link_text.markup`
- `url.com`: `link_uri` -> `link_uri.markup`
- `*italic*`: `emphasis` -> `emphasis.markup`
- `**bold**`: `emphasis.strong` -> `emphasis.strong.markup`
- ``` `raw` ```: `text.literal` -> `text.literal.markup`
- `~~strikethrough~~`: `strikethrough.markup`
````md
# Heading
Some stylized text:
- `raw`
- *italic*
- ~strike~
- **strong**
> quoted
```python
print("some code")
```
1. Here is an 
2. A [link](https://github.com/zed-industries)
3. And even a [referenced link][1]
[1]: https://zed.dev
| tables | are |
| --- | --- |
| properly | scoped |
````
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