ci: remove broken changeset-bot workflow in favor of GitHub App

[kimyouknow]

Summary

Removes the broken .github/workflows/changeset-bot.yml workflow. The changesets/bot repository is a Probot-based GitHub App (deployed as a Next.js app on Vercel), not a reusable GitHub Action. It has no action.yml or Dockerfile, so uses: changesets/bot@<ref> has been failing since it was introduced.

Root cause timeline

PR	Change	Result
#350	Added uses: changesets/bot@v1	v1 tag does not exist → failed from day one
#363	Changed to @<master SHA>	SHA resolved, but Can't find action.yml / Dockerfile

Verified via the repo tree — changesets/bot ships only these:

app.yml                  ← Probot app manifest
pages/api/webhook.ts     ← Next.js webhook handler
index.ts                 ← Probot entry
package.json
(no action.yml, no Dockerfile)

Global code search (gh search code "changesets/bot") returned only this repository using uses: changesets/bot@*. No other project uses this pattern — the README explicitly directs to install the GitHub App.

Replacement

The changeset-bot GitHub App has been installed on @toss with access to toss/react-simplikit. The App will automatically comment on every PR about changeset status — same behavior the broken workflow was trying to replicate.

App install URL: https://github.com/apps/changeset-bot

Scope

• 1 file deleted: .github/workflows/changeset-bot.yml
• No other workflow affected
• Unrelated to changesets/action@v1.7.0 used in release.yml (that is a real action and works correctly)

Test plan

• After merge, open a test PR without a changeset → verify the App comments "You need to add a changeset..."
• Open a test PR with a changeset → verify the App comments "This PR includes changesets"
• Confirm the bot check column no longer appears on PRs

[changeset-bot]

⚠️ No Changeset found

Latest commit: 3e999f5

Merging this PR will not cause a version bump for any packages. If these changes should not result in a new version, you're good to go. If these changes should result in a version bump, you need to add a changeset.

This PR includes no changesets

When changesets are added to this PR, you'll see the packages that this PR includes changesets for and the associated semver types

Click here to learn what changesets are, and how to add one.

Click here if you're a maintainer who wants to add a changeset to this PR

[github-actions]

Size Change: 0 B 🆕

Total Size: 0 B

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