Add Factorio mod push step and README

- Add factorio-mod-push step to build.yml (mod-folder: ./plugin)
- Create plugin/README.md as bootstrap for mod portal description

.gitea/workflows/build.yml

@@ -55,6 +55,13 @@ jobs:
           username: ${{ secrets.REGISTRY_USERNAME }}
           password: ${{ secrets.REGISTRY_TOKEN }}
 
+      - name: Package and push Factorio mod
+        uses: https://git.sebse.de/sebse/actions/factorio-mod-push@main
+        with:
+          mod-folder: ./plugin
+          version: ${{ steps.version.outputs.version }}
+          factorio-token: ${{ secrets.FACTORIO_TOKEN }}
+
       - name: Deploy to prod
         uses: https://git.sebse.de/sebse/actions/helm-deploy@main
         with:

plugin/README.md

@@ -0,0 +1,3 @@
+# Signal Exporter
+
+Provides a custom combinator that reads both connected circuit and logistic networks, writing the data to a JSON file.