feat: Add Git4Idea to platformPlugins in gradle.properties.

Author: Blarc

gradle.properties

@@ -15,7 +15,7 @@ platformVersion = 2023.1
 
 # https://plugins.jetbrains.com/docs/intellij/plugin-dependencies.html
 # Example: platformPlugins = com.intellij.java, com.jetbrains.php:203.4449.22
-platformPlugins = org.jetbrains.kotlin, org.jetbrains.plugins.github
+platformPlugins = org.jetbrains.kotlin, org.jetbrains.plugins.github, Git4Idea
 
 # If targeting 2022.3+, Java 17 is required.
 javaVersion = 17