[ci skip] migrate CI to namespace 🚀 (#1888)

.github/workflows/gradle.yml

@@ -6,18 +6,28 @@ on: [push, pull_request]
 
 jobs:
   build:
-    runs-on: ubuntu-24.04
+    runs-on: namespace-profile-linux-default
     steps:
     - name: Checkout Repository
-      uses: actions/checkout@v6
+      uses: namespacelabs/nscloud-checkout-action@v9
       with:
         persist-credentials: false
+    - name: Set up cache
+      uses: namespacelabs/nscloud-cache-action@v1
+      with:
+        cache: gradle
+    - name: Setup gradle build cache
+      run: |
+        nsc cache gradle setup --init-gradle /tmp/init.gradle
     - name: Set up Gradle
-      uses: gradle/actions/setup-gradle@v5
+      uses: gradle/actions/setup-gradle@v6
+      with:
+        cache-disabled: true # namespace handles this
     - name: Set up JDK 21
-      uses: actions/setup-java@v5
+      uses: actions/setup-java@v6
       with:
         java-version: 21
         distribution: 'zulu'
+        cache: "" # namespace handles this
     - name: Build with Gradle
-      run: ./gradlew build
+      run: ./gradlew --init-script=/tmp/init.gradle build

README.md

@@ -40,3 +40,5 @@ page.
 Translations are handled using [Crowdin](https://papermc-io.crowdin.com/velocity).
 If you want to translate a language not available on Crowdin,
 you might want to ask in the [Discord](https://discord.gg/papermc) about it.
+
+<img src="https://papermc.io/assets/misc/namespace-oss-badge.svg?project=velocity" alt="CI powered by namespace badge" />