feat(action): Try test composite local action

.forgejo/dotnet-build/action.yml

@@ -0,0 +1,22 @@
+inputs:
+  # input-one:
+  #   default: 'one'
+  #   description: 'description one'
+  # input-two-required:
+  #   description: 'description two'
+  #   required: true
+outputs:
+  key:
+    description: 'output value'
+    value: "${{ steps.one.outputs.key }}"
+
+runs:
+  using: "composite"
+  steps:
+    - name: FORGEJO_ACTION_PATH
+      run: |
+        set -x
+        test -e "$FORGEJO_ACTION_PATH"
+        test "$FORGEJO_ACTION_PATH" = "${{ env.FORGEJO_ACTION_PATH }}"
+
+    - run: echo key=${{ inputs.input-two-required }} >> $FORGEJO_OUTPUT