Comment the GH Actions run link on !build comments for easier troubleshooting

.github/workflows/comment-!build-commands.yml

@@ -92,12 +92,37 @@ jobs:
             echo "Failed to detect if the build command written in the comment should have been '!build-dev', '!build-profiling', or '!build'" >> $GITHUB_OUTPUT
           fi
 
+      - name: 💬 Comment Actions run link
+        id: comment_actions_run_link
+        uses: actions/github-script@v6
+        with:
+          script: |
+            github.rest.issues.updateComment({
+              comment_id: ${{ github.event.comment.id }},
+              owner: context.repo.owner,
+              repo: context.repo.repo,
+              body: '!build ([build link](https://github.com/GraphiteEditor/Graphite/actions/runs/' + context.runId + '))'
+            });
+
       - name: 🌐 Build Graphite web code
         env:
           NODE_ENV: production
+        if: ${{ success() || failure()}}
         run: |
           cd frontend
           mold -run npm run ${{ steps.build_command.outputs.command }}
+
+      - name: ❗ Warn on build failure
+        if: ${{ failure() }}
+        uses: actions/github-script@v6
+        with:
+          script: |
+            github.rest.issues.createComment({
+              issue_number: context.issue.number,
+              owner: context.repo.owner,
+              repo: context.repo.repo,
+              body: 'The build process has failed. Please check the [build logs](https://github.com/GraphiteEditor/Graphite/actions/runs/' + context.runId + ') for details.'
+            });
 
       - name: 📤 Publish to Cloudflare Pages
         id: cloudflare
@@ -110,6 +135,18 @@ jobs:
           projectName: graphite-dev
           directory: frontend/dist
 
+      - name: ❗ Warn on publish failure
+        if: ${{ failure() }}
+        uses: actions/github-script@v6
+        with:
+          script: |
+            github.rest.issues.createComment({
+              issue_number: context.issue.number,
+              owner: context.repo.owner,
+              repo: context.repo.repo,
+              body: 'The deployment to Cloudflare Pages has failed. Please check the [build logs](https://github.com/GraphiteEditor/Graphite/actions/runs/' + context.runId + ') for details.
+            });
+
       - name: 💬 Comment build link
         uses: actions/github-script@v6
         with: