actions: move backup into feature branch

backup/action.yml

@@ -1,13 +0,0 @@
-name: backup
-description: backup all postgres databases
-
-runs:
-  using: "composite"
-  steps:
-    - name: dump databases
-      shell: bash
-      run: |
-        docker ps
-
-    # - name: backup databases
-    #   run: |