feat: adopt changesets for automated versioning and publishing

Replace the manual version bump + GitHub release trigger workflow with
changesets, so version bumps and npm publishing are handled automatically
via a "Version Packages" PR.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: alerizzo

.changeset/README.md

@@ -0,0 +1,8 @@
+# Changesets
+
+Hello and welcome! This folder has been automatically generated by `@changesets/cli`, a build tool that works
+with multi-package repos, or single-package repos to help you version and publish your code. You can
+find the full documentation for it [in our repository](https://github.com/changesets/changesets).
+
+We have a quick list of common questions to get you started engaging with this project in
+[our documentation](https://github.com/changesets/changesets/blob/main/docs/common-questions.md).

.changeset/config.json

@@ -0,0 +1,14 @@
+{
+  "$schema": "https://unpkg.com/@changesets/config@3.1.3/schema.json",
+  "changelog": [
+    "@changesets/changelog-github",
+    { "repo": "codacy/codacy-cloud-cli" }
+  ],
+  "commit": false,
+  "fixed": [],
+  "linked": [],
+  "access": "public",
+  "baseBranch": "main",
+  "updateInternalDependencies": "patch",
+  "ignore": []
+}

.github/workflows/ci.yml

@@ -37,3 +37,25 @@ jobs:
 
       - name: Test
         run: npm test
+
+  changeset-check:
+    if: github.event_name == 'pull_request'
+    runs-on: ubuntu-latest
+
+    steps:
+      - uses: actions/checkout@34e114876b0b11c390a56381ad16ebd13914f8d5 # v4
+        with:
+          fetch-depth: 0
+
+      - name: Check for changesets
+        run: |
+          # Count .changeset/*.md files added/modified in this PR compared to the base branch
+          CHANGESETS=$(git diff --name-only origin/${{ github.base_ref }}...HEAD -- '.changeset/*.md' ':!.changeset/README.md' | wc -l)
+          if [ "$CHANGESETS" -eq 0 ]; then
+            echo "::error::No changeset found for this PR. Run 'npx changeset' to describe your changes."
+            echo ""
+            echo "If this PR does not require a version bump (e.g., docs-only or CI changes),"
+            echo "add an empty changeset with: npx changeset --empty"
+            exit 1
+          fi
+          echo "Found $CHANGESETS changeset file(s) changed in this PR."

.github/workflows/publish.yml

@@ -0,0 +1,46 @@
+name: Release
+
+on:
+  push:
+    branches: [main]
+
+concurrency:
+  group: release-${{ github.ref }}
+  cancel-in-progress: false
+
+permissions:
+  contents: write
+  pull-requests: write
+  id-token: write
+
+jobs:
+  release:
+    runs-on: ubuntu-latest
+
+    steps:
+      - uses: actions/checkout@34e114876b0b11c390a56381ad16ebd13914f8d5 # v4
+
+      - uses: actions/setup-node@49933ea5288caeca8642d1e84afbd3f7d6820020 # v4
+        with:
+          node-version: 22
+          cache: npm
+          registry-url: "https://registry.npmjs.org"
+
+      - name: Install dependencies
+        run: npm ci
+
+      - name: Generate API client
+        run: npm run update-api
+
+      - name: Build
+        run: npm run build
+
+      - name: Create Release PR or Publish
+        uses: changesets/action@6a0a831ff30acef54f2c6aa1cbbc1096b066edaf # v1
+        with:
+          publish: npm run release
+          title: "chore: version packages"
+          commit: "chore: version packages"
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+          NODE_AUTH_TOKEN: ${{ secrets.NPM_TOKEN }}