[ci skip] Add IDEA extension plugin

api/build.gradle.kts

@@ -1,5 +1,6 @@
 plugins {
     id("net.kyori.blossom")
+    id("org.jetbrains.gradle.plugin.idea-ext")
     id("via.shadow-conventions")
 }
 

common/build.gradle.kts

@@ -1,7 +1,3 @@
-plugins {
-    id("net.kyori.blossom")
-}
-
 dependencies {
     api(projects.viaversionApi)
     api(projects.viaversionApiLegacy)

settings.gradle.kts

@@ -18,6 +18,7 @@ pluginManagement {
     // default plugin versions
     plugins {
         id("net.kyori.blossom") version "2.0.1"
+        id("org.jetbrains.gradle.plugin.idea-ext") version "1.1.7"
         id("com.github.johnrengelman.shadow") version "8.1.1"
     }
 }