Add a workflow for sending benchmark requests.

.github/workflows/rapier-ci-bench.yml

@@ -0,0 +1,20 @@
+name: Rapier CI bench
+
+on:
+  workflow_dispatch
+
+jobs:
+  send-bench-message:
+    runs-on: ubuntu-latest
+    steps:
+      - shell: bash
+        env:
+          BENCHBOT_AMQP_USER: ${{ secrets.BENCHBOT_AMQP_USER }}
+          BENCHBOT_AMQP_PASS: ${{ secrets.BENCHBOT_AMQP_PASS }}
+          BENCHBOT_AMQP_VHOST: ${{ secrets.BENCHBOT_AMQP_VHOST }}
+          BENCHBOT_AMQP_HOST: ${{ secrets.BENCHBOT_AMQP_HOST }}
+      - name: Send 3D bench message
+        run: curl -u ${BENCHBOT_AMQP_USER}:${BENCHBOT_AMQP_PASS} \
+             -i -H "content-type:application/json" -X POST \
+             https://${BENCHBOT_AMQP_PASS}/api/exchanges/${BENCHBOT_AMQP_VHOST}//publish \
+            -d'{"properties":{},"routing_key":"benchmark","payload":"{ \"repository\":\"https://github.com/dimforge/rapier\", \"branch\":\"$GITHUB_REF\", \"commit\":\"$GITHUB_SHA\" }","payload_encoding":"string"}'