ci: add create pull request action

.github/workflows/ci.yaml

@@ -73,3 +73,62 @@ jobs:
 
       - name: Verify
         run: yarn verify:android
+
+  create-pr:
+    runs-on: ubuntu-latest
+    needs: [lint, verify-ios, verify-android]
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v3
+        with:
+          fetch-depth: 0
+
+      - name: Create pull or update pull request
+        uses: actions/github-script@v6
+        with:
+          github-token: ${{ secrets.GITHUB_TOKEN }}
+          script: |
+            const head = context.payload.ref.replace('refs/heads/', '');
+            const base = 'main';
+            const title = 'Merge ' + head + ' into ' + base + ' 🔀';
+            const body = 'This is an automated PR';
+
+            async function run() {
+              try {
+                const { data: pulls } = await github.rest.pulls.list({
+                  owner: context.repo.owner,
+                  repo: context.repo.repo,
+                  state: 'open',
+                  head: context.repo.owner + ':' + head,
+                  base: base
+                });
+
+                if (pulls.length > 0) {
+                  const pullNumber = pulls[0].number;
+                  console.log(`Updating existing PR #${pullNumber}`);
+
+                  await github.rest.pulls.update({
+                    owner: context.repo.owner,
+                    repo: context.repo.repo,
+                    pull_number: pullNumber,
+                    title: title,
+                    body: body
+                  });
+                } else {
+                  console.log('Creating new PR');
+                  await github.rest.pulls.create({
+                    owner: context.repo.owner,
+                    repo: context.repo.repo,
+                    title: title,
+                    body: body,
+                    head: head,
+                    base: base
+                  });
+                }
+              } catch (error) {
+                console.error('Error processing pull request:', error);
+                throw error;
+              }
+            }
+
+            run();