Add gitignore

.gitignore

@@ -1,25 +1,54 @@
-# ---> Kotlin
-# Compiled class file
+# IntelliJ IDEA
+.idea/
+*.iml
+*.iws
+*.iws.original
+*.ipr
 *.class
 
-# Log file
-*.log
+# Gradle
+.gradle/
+build/
+!gradle-wrapper.jar
+
+# Kotlin
+*.kotlin_module
 
-# BlueJ files
-*.ctxt
+# OS-specific files
+.DS_Store
+Thumbs.db
 
-# Mobile Tools for Java (J2ME)
-.mtj.tmp/
+# Logs and databases
+*.log
+*.log.*
+*.json
+*.sqlite
+*.db
+*.hprof
 
-# Package Files #
+# Compiled files
 *.jar
 *.war
-*.nar
 *.ear
 *.zip
 *.tar.gz
 *.rar
 
-# virtual machine crash logs, see http://www.java.com/en/download/help/error_hotspot.xml
-hs_err_pid*
+# Dependency directories
+/bin/
+/build/
+/lib/
+/out/
+/target/
+
+# Eclipse
+.settings/
+
+# User-specific files
+*.suo
+*.user
+*.swp
+*.DS_Store
 
+# Visual Studio Code
+.vscode/