chore: update .gitignore and IntelliJ settings

- Updated `.gitignore` to exclude IDEA files from being indexed
- Updated code style settings to follow the official Kotlin standards

.gitignore

@@ -41,19 +41,10 @@ captures/
 
 # IntelliJ
 *.iml
-.idea/workspace.xml
-.idea/tasks.xml
-.idea/gradle.xml
-.idea/assetWizardSettings.xml
-.idea/dictionaries
-.idea/libraries
-# Android Studio 3 in .gitignore file.
-.idea/caches
-.idea/modules.xml
-# Comment next line if keeping position of elements in Navigation Editor is relevant for you
-.idea/navEditor.xml
-# Local deployment targets
-.idea/deploymentTargetSelector.xml
+/.idea/*
+!/.idea/codeStyleSettings.xml
+!/.idea/codeStyles
+!/.idea/dictionaries
 
 # Keystore files
 # Uncomment the following lines if you do not want to check your keystore files in.
@@ -91,11 +82,6 @@ lint/tmp/
 
 publish.properties
 *.gpg
-/.idea/.gitignore
-/.idea/compiler.xml
-/.idea/jarRepositories.xml
-/.idea/misc.xml
-/.idea/shelf
 
 # general
 **/.DS_Store