Consume cap-js/cf-setup from GitHub marketplace (#51)

* Delete .github/actions directory

* Update cf-setup action to use cap-js repository

Author: swaldmann

.github/actions/cf-setup/action.yaml

@@ -33,7 +33,7 @@ jobs:
       - uses: actions/setup-node@v5
         with:
           node-version: 22
-      - uses: ./.github/actions/cf-setup
+      - uses: cap-js/cf-setup@v1
         with:
           cf-api: ${{ vars.CF_API }}
           cf-org: ${{ vars.CF_ORG }}