Move dashboard workflow to worflow dir (#554)

Co-authored-by: mariana <marianameireles@protonmail.com>

.github/workflows/dashboard.yaml

@@ -0,0 +1,18 @@
+name: Push issue to Github Project dashboard
+
+on:
+    issues:
+        types:
+        -   opened
+    pull_request_target:
+        types:
+        -   opened
+
+jobs:
+    add_to_project:
+        runs-on: ubuntu-latest
+        steps:
+        -   uses: actions/add-to-project@v0.0.3
+            with:
+                project-url: https://github.com/orgs/pyscript/projects/4/
+                github-token: ${{ secrets.PROJECT_TOKEN }}