Introduce changeset checker

.github/workflows/check-changeset.yml

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+# -------------------------------------------------------------------------------------
+#
+# Copyright (c) 2024, WSO2 LLC. (https://www.wso2.com).
+#
+# WSO2 LLC. licenses this file to you under the Apache License,
+# Version 2.0 (the "License"); you may not use this file except
+# in compliance with the License.
+# You may obtain a copy of the License at
+#
+#    http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing,
+# software distributed under the License is distributed on an
+# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+# KIND, either express or implied. See the License for the
+# specific language governing permissions and limitations
+# under the License.
+#
+# --------------------------------------------------------------------------------------
+
+# This workflow will check if a submitted PR has changesets.
+
+name: 🦋 Check for Changeset
+
+on:
+    workflow_run:
+        workflows: ["Receive PR"]
+        types:
+            - completed
+
+env:
+    GH_TOKEN: ${{ secrets.RELEASE_BOT_TOKEN }}
+
+jobs:
+    process-pr:
+        runs-on: ubuntu-latest
+        if: >
+            github.event.workflow_run.event == 'pull_request' &&
+            github.event.workflow_run.conclusion == 'success'
+        steps:
+            - name: Download PR Number Artifact
+              uses: actions/[email protected]
+              with:
+                script: |
+                    const artifacts = await github.actions.listWorkflowRunArtifacts({
+                        owner: context.repo.owner,
+                        repo: context.repo.repo,
+                        run_id: ${{ github.event.workflow_run.id }},
+                    });
+                    const matchArtifact = artifacts.data.artifacts.find(artifact => artifact.name === "pr-number");
+                    const download = await github.actions.downloadArtifact({
+                        owner: context.repo.owner,
+                        repo: context.repo.repo,
+                        artifact_id: matchArtifact.id,
+                        archive_format: 'zip',
+                    });
+                    const fs = require('fs');
+                    fs.writeFileSync('${{github.workspace}}/pr-number.zip', Buffer.from(download.data));
+
+            - name: Extract PR Number Artifact
+              run: unzip pr-number.zip
+
+            - name: 💬 Add Changeset Comment
+              uses: actions/[email protected]
+              with:
+                github-token: ${{ env.GH_TOKEN }}
+                    script: |
+                        const PR_NUMBER = context.payload.pull_request.number;
+                        const REPO_OWNER = context.repo.owner;
+                        const REPO_NAME = context.repo.repo;
+                        const PR_HEAD_SHA = context.payload.pull_request.head.sha;
+
+                        const files = await github.pulls.listFiles({
+                            owner: REPO_OWNER,
+                            repo: REPO_NAME,
+                            pull_number: PR_NUMBER,
+                        });
+
+                        const CHANGED_FILES = files.data.map(file => file.filename);
+                        console.log("CHANGED_FILES_URL: https://api.github.com/repos/" + REPO_NAME + "/pulls/" + PR_NUMBER + "/files");
+                        console.log("CHANGED_FILES:", CHANGED_FILES);
+
+                        const CHANGES_COUNT = CHANGED_FILES.filter(filename => /^\.changeset\/.*\.md$/.test(filename)).length;
+                        console.log("CHANGES_COUNT:", CHANGES_COUNT);
+
+                        let COMMENT;
+                        if (CHANGES_COUNT > 0) {
+                            COMMENT = `<h3>🦋 Changeset detected</h3><p>Latest commit: ${PR_HEAD_SHA}</p><p><b>The changes in this PR will be included in the next version bump.</b></p><p>Not sure what this means? <a href="https://github.com/changesets/changesets/blob/master/docs/adding-a-changeset.md">Click here to learn what changesets are</a>.</p>`;
+                        } else {
+                            COMMENT = `<h3>⚠️ No Changeset found</h3><p>Latest commit: ${PR_HEAD_SHA}</p>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.</p><p><b>If these changes should result in a version bump, you need to add a changeset.</b></p><a href="https://github.com/changesets/changesets/blob/master/docs/adding-a-changeset.md">Click here to learn what changesets are, and how to add one</a>`;
+                        }
+
+                        await github.issues.createComment({
+                            owner: REPO_OWNER,
+                            repo: REPO_NAME,
+                            issue_number: PR_NUMBER,
+                            body: COMMENT,
+                        });

.github/workflows/receive-pr.yml

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+# -------------------------------------------------------------------------------------
+#
+# Copyright (c) 2024, WSO2 LLC. (https://www.wso2.com).
+#
+# WSO2 LLC. licenses this file to you under the Apache License,
+# Version 2.0 (the "License"); you may not use this file except
+# in compliance with the License.
+# You may obtain a copy of the License at
+#
+#    http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing,
+# software distributed under the License is distributed on an
+# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+# KIND, either express or implied. See the License for the
+# specific language governing permissions and limitations
+# under the License.
+#
+# -------------------------------------------------------------------------------------
+
+name: Receive PR
+
+on:
+  pull_request:
+    branches: [master]
+
+jobs:
+  save-pr-information:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout Repository
+        uses: actions/checkout@v3
+
+      - name: Display PR Information
+        run: echo "PR Number \#${{github.event.number}}"
+
+      - name: Save PR Number for Later Use
+        run: echo "${{github.event.number}}" > PR_NUMBER
+
+      - name: Upload PR Number as Artifact
+        uses: actions/upload-artifact@v3
+        with:
+          name: pr-number
+          path: PR_NUMBER