refactor(build): 升级Gradle及相关构建配置

- 将Gradle版本从5.2.1升级至8.12
- 调整IntelliJ插件开发工具链版本
- 降低Kotlin版本至1.3.72以兼容旧环境
- 修改JVM目标版本至1.8
- 移除jcenter仓库仅保留mavenCentral

Author: lltx

build.gradle

@@ -1,7 +1,7 @@
 plugins {
     id 'java'
-    id 'org.jetbrains.intellij' version '1.17.4'
-    id 'org.jetbrains.kotlin.jvm' version '1.9.10'
+    id 'org.jetbrains.intellij' version '0.4.14'
+    id 'org.jetbrains.kotlin.jvm' version '1.3.72'
 }
 
 apply plugin: "java"
@@ -12,26 +12,25 @@ group 'com.star.easydoc'
 version '4.3.1'
 
 repositories {
-    jcenter()
     mavenCentral()
 }
 
 compileKotlin {
-    kotlinOptions.jvmTarget = "17"
+    kotlinOptions.jvmTarget = "1.8"
 }
 compileTestKotlin {
-    kotlinOptions.jvmTarget = "17"
+    kotlinOptions.jvmTarget = "1.8"
 }
 
-sourceCompatibility = 17
-targetCompatibility = 17
+sourceCompatibility = 1.8
+targetCompatibility = 1.8
 
 // See https://github.com/JetBrains/gradle-intellij-plugin/
 // See https://www.jetbrains.com/intellij-repository/releases
 intellij {
     plugins = ['Kotlin']
 //    plugins 'java'
-    version '2023.2'
+    version '2019.1'
     pluginName 'Easy Javadoc'
     updateSinceUntilBuild false
 }

gradle/wrapper/gradle-wrapper.properties

@@ -3,4 +3,4 @@ distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists
-distributionUrl=https://mirrors.aliyun.com/macports/distfiles/gradle/gradle-5.2.1-bin.zip
+distributionUrl=https://mirrors.aliyun.com/macports/distfiles/gradle/gradle-8.12-bin.zip