Add PR build workflows

.github/workflows/publish-pr-comment.yml

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+name: Comment on pull request
+on:
+  workflow_run:
+    workflows: ['Test workflow with upload']
+    types: [completed]
+jobs:
+  pr_comment:
+    if: github.event.workflow_run.event == 'pull_request' && github.event.workflow_run.conclusion == 'success'
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/github-script@v6
+        with:
+          # This snippet is public-domain, taken from
+          # https://github.com/oprypin/nightly.link/blob/master/.github/workflows/pr-comment.yml
+          script: |
+            async function upsertComment(owner, repo, issue_number, purpose, body) {
+              const {data: comments} = await github.rest.issues.listComments(
+                {owner, repo, issue_number});
+              const marker = `<!-- bot: ${purpose} -->`;
+              body = marker + "\n" + body;
+              const existing = comments.filter((c) => c.body.includes(marker));
+              if (existing.length > 0) {
+                const last = existing[existing.length - 1];
+                core.info(`Updating comment ${last.id}`);
+                await github.rest.issues.updateComment({
+                  owner, repo,
+                  body,
+                  comment_id: last.id,
+                });
+              } else {
+                core.info(`Creating a comment in issue / PR #${issue_number}`);
+                await github.rest.issues.createComment({issue_number, body, owner, repo});
+              }
+            }
+            const {owner, repo} = context.repo;
+            const run_id = ${{github.event.workflow_run.id}};
+            const pull_requests = ${{ toJSON(github.event.workflow_run.pull_requests) }};
+            if (!pull_requests.length) {
+              return core.error("This workflow doesn't match any pull requests!");
+            }
+            const artifacts = await github.paginate(
+              github.rest.actions.listWorkflowRunArtifacts, {owner, repo, run_id});
+            if (!artifacts.length) {
+              return core.error(`No artifacts found`);
+            }
+            let body = `Download the artifacts for this pull request:\n`;
+            for (const art of artifacts) {
+              body += `\n* [${art.name}.zip](https://nightly.link/${owner}/${repo}/actions/artifacts/${art.id}.zip)`;
+            }
+            core.info("Review thread message body:", body);
+            for (const pr of pull_requests) {
+              await upsertComment(owner, repo, pr.number,
+                "nightly-link", body);
+            }

.github/workflows/publish-pr.yml

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+name: Publish (PR)
+
+on:
+  pull_request:
+    branches:
+      - development
+
+jobs:
+  publish:
+    runs-on: ${{ matrix.os }}
+
+    strategy:
+      matrix:
+        os: [macos-latest]
+
+    steps:
+      - name: Checkout git repo
+        uses: actions/checkout@v1
+
+      - name: Install Node and NPM
+        uses: actions/setup-node@v1
+        with:
+          node-version: 16
+          cache: npm
+
+      - name: Install dependencies
+        run: |
+          npm install --legacy-peer-deps
+
+      - name: Build releases
+        uses: nick-invision/retry@v2.8.2
+        with:
+          timeout_minutes: 30
+          max_attempts: 3
+          retry_on: error
+          command: |
+            npm run postinstall
+            npm run build
+            npm exec electron-builder build --publish never --win --mac --linux
+          on_retry_command: npm cache clean --force
+
+      - uses: actions/upload-artifact@v3
+        with:
+          name: binaries
+          path: |
+            release/build/*.exe
+            release/build/*.dmg
+            release/build/*.AppImage
+            release/build/*.deb
+            release/build/*.rpm