build(plugins): 插件构建统一钉到 gradle 9.8 镜像与带 sha256 的 wrapper，paper-api/Limbo 对齐锁文件并启用依赖校验

plugins/paper/gradle/wrapper/gradle-wrapper.properties

@@ -0,0 +1,10 @@
+distributionBase=GRADLE_USER_HOME
+distributionPath=wrapper/dists
+distributionSha256Sum=bafd5ce9cfaea0fbccfdc8439a1ac42fbd4cd9c89dc9a988228d8a2639a58e6c
+distributionUrl=https\://services.gradle.org/distributions/gradle-9.8.0-bin.zip
+networkTimeout=10000
+retries=0
+retryBackOffMs=500
+validateDistributionUrl=true
+zipStoreBase=GRADLE_USER_HOME
+zipStorePath=wrapper/dists