Update: Revamp gitignore logic from inclusive to exclusive

.gitignore

@@ -1,19 +1,12 @@
-/*
-!/.gitignore
-!/build.gradle.kts
-!/settings.gradle.kts
-!/CHANGELOG.md
-!/COPYING
-!/DEVDOC.md
-!/extra
-!/gradle
-!/gradle.properties
-!/gradlew
-!/gradlew.bat
-!/metadata
-!/schemas
-!/proguard.pro
-!/README.md
-!/neo_banner.png
-!/src
-!/config
+*.iml
+*.pyc
+*.swp
+*.hprof
+.gradle
+.idea
+.kotlin
+build/
+local.properties
+src/main/jniLibs/
+release/
+neo/