Init workflows (#16)

Signed-off-by: LE SAULNIER Kevin <[email protected]>

Author: klesaulnier

.github/workflows/prepare-release.yml

@@ -0,0 +1,11 @@
+name: Prepare release
+
+on:
+  workflow_dispatch:
+
+jobs:
+  say-hello:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Echo message
+        run: echo "Hello"