Add automated, ephemeral release workflow [skip ci]

Author: embeddedt

.github/workflows/release.yml

@@ -0,0 +1,30 @@
+name: release-artifacts
+
+on:
+  release:
+    types:
+      - published
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+        with:
+          fetch-depth: 0
+      - uses: actions/setup-java@v3
+        with:
+          distribution: 'temurin'
+          java-version: '17'
+      - name: Grant execute permission for gradlew
+        run: chmod +x gradlew
+      - name: Build and publish mod to CurseForge & Modrinth
+        run: ./gradlew forge:publishToModSites fabric:publishToModSites
+        env:
+          CURSEFORGE_TOKEN: ${{ secrets.CURSEFORGE_TOKEN }}
+          MODRINTH_TOKEN: ${{ secrets.MODRINTH_TOKEN }}
+      - name: Upload assets to GitHub
+        uses: AButler/[email protected]
+        with:
+          files: 'bin/*'
+          repo-token: ${{ secrets.GITHUB_TOKEN }}