build: Add 'IntelliJ Rust' related files and folders to ignore list

.gitignore

@@ -9,10 +9,18 @@ Cargo.lock
 # These are backup files generated by rustfmt
 **/*.rs.bk
 
-
-# Added by cargo
-#
-# already existing elements were commented out
-
-/target
-#Cargo.lock
+# Added by IntelliJ Rust
+.idea
+*.iml
+.gradle
+out/
+bin/
+build/
+build-cache
+gen/
+deps/
+exampleProject
+testData
+.DS_Store
+/pretty_printers_tests/target
+/native-helper/target