feat: add changeset release notes workflow

- Add .changeset/config.json with @changesets/changelog-github and fixed versioning for kilo-code + @kilocode/cli
- Add .github/workflows/changeset-release.yml to auto-create version bump PRs on push to main
- Add @changesets/cli and @changesets/changelog-github devDependencies
- Add changeset and changeset:version scripts to root package.json
- Add .changeset/README.md with contributor instructions

Closes #7909

.github/workflows/changeset-release.yml

@@ -0,0 +1,34 @@
+name: Changeset Release
+
+on:
+  push:
+    branches:
+      - main
+  workflow_dispatch:
+
+jobs:
+  changeset-pr-version-bump:
+    runs-on: ubuntu-latest
+    if: github.repository == 'Kilo-Org/kilocode'
+    permissions:
+      contents: write
+      pull-requests: write
+    steps:
+      - uses: actions/checkout@v4
+        with:
+          fetch-depth: 0
+
+      - uses: ./.github/actions/setup-bun
+
+      - name: Install dependencies
+        run: bun install
+
+      - name: Changeset Pull Request
+        id: changesets
+        uses: changesets/action@v1
+        with:
+          commit: "chore: changeset version bump"
+          title: "chore: changeset version bump"
+          version: bun run changeset:version
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}