## Description
Simplifies the public-facing pull request template by removing
internal-only sections and guiding contributors toward the
issue-readiness workflow.
Changes:
- Removed the `Server API dependencies` section and its internal Notion
links.
- Removed the `Changelog Entries for Stable` section (internal release
process).
- Removed the testing-policy Notion link from the `Testing` section.
- Added a `Linked Issue` section with checkboxes asking authors to
confirm:
- The linked issue is labeled `ready-to-spec` or `ready-to-implement`.
- Screenshots or a short video of the implementation are included where
appropriate.
- Added a `Screenshots / Videos` section as a place to attach that
media.
## Testing
Documentation-only change; verified the rendered template via `git
diff`.
_Conversation:
https://staging.warp.dev/conversation/7821ed8c-960f-406d-bec1-485a6c540873_
_Run:
https://oz.staging.warp.dev/runs/019dd545-1271-74cb-81ad-2545e30fb1fc_
_This PR was generated with [Oz](https://warp.dev/oz)._
---------
Co-authored-by: Oz <oz-agent@warp.dev>
