Add IDEA file to git exclusion

.gitignore

@@ -73,6 +73,7 @@ local.properties
 # Reference: https://intellij-support.jetbrains.com/hc/en-us/articles/206544839
 
 # User-specific stuff
+.idea/**/libraries-with-intellij-classes.xml
 .idea/**/workspace.xml
 .idea/**/tasks.xml
 .idea/**/usage.statistics.xml