Refactor build system to support 1.21.10, 1.21.11, and 26.1.2

.github/workflows/build.yml

@@ -7,15 +7,15 @@ jobs:
     environment: modrinth
     steps:
     - uses: actions/checkout@v3
-    - name: Set up JDK 21
+    - name: Set up JDK 25
       uses: actions/setup-java@v3
       with:
-        java-version: '21'
+        java-version: '25'
         distribution: 'temurin'
     - name: Setup Gradle
       uses: gradle/gradle-build-action@v2
-    - name: Execute Gradle build
-      run: ./gradlew build
+    - name: Execute Gradle build (all Stonecutter targets)
+      run: ./gradlew chiseledBuild
     - run: mkdir staging && cp build/libs/*.jar staging
     - run: cd build/libs && md5sum *.jar > ../../md5sum.txt
     - run: echo "filename=`ls build/libs/*.jar |xargs basename`" >> $GITHUB_ENV