This PR removes Preview callouts from documentation for features that
are now in Stable.
## Files Updated
• docs/src/collaboration/overview.md
• docs/src/debugger.md
• docs/src/configuring-languages.md
• docs/src/troubleshooting.md
• docs/src/outline-panel.md
• docs/src/getting-started.md
• docs/src/tasks.md
• docs/src/ai/edit-prediction.md
• docs/src/ai/llm-providers.md
## What This Does
Removes callouts like:
```markdown
> **Preview:** This feature is available in Zed Preview. It will be included in the next Stable release.
```
And:
```markdown
> **Changed in Preview (v0.XXX).** See [release notes](/releases#0.XXX).
```
These features are now in Stable, so the callouts are no longer needed.
Release Notes:
- N/A