added .gitignore

.gitignore

+# IntelliJ IDEA
+.idea/
+*.iws
+*.iml
+out/
+
+
+# OS
+# macOS
+.DS_Store
+
+# Windows
+Thumbs.db
+desktop.ini
+
+# Linux
+*~
+
+
+# JAVA
+# Compiled class file
+*.class
+
+# Log files
+*.log
+
+# Package Files #
+*.jar
+*.war
+*.nar
+*.ear
+*.zip
+*.tar.gz
+*.rar
+
+# JavaFX resources
+bin/
+
+# Exclude runtime configuration
+*.run/
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