update `.gitignore`

bindings/cashu-ffi/.gitignore

@@ -1 +1,38 @@
+target
+build
+.gradle
+wallet_db
+bdk_ffi_test
+local.properties
+*.log
+*.dylib
+*.so
+.DS_Store
+testdb
+xcuserdata
+.lsp
+.clj-kondo
+.idea/
+.editorconfig
+bdk.kt
+
+# Swift related
+/.build
+/.swiftpm
+/Packages
+/*.xcodeproj
+xcuserdata/
+DerivedData/
+.swiftpm/xcode/package.xcworkspace/contents.xcworkspacedata
+bdkFFI.xcframework.zip
+bdkFFI
+libbdkffi.a
+bdkFFI.h
+BitcoinDevKit.swift
+bdk.swift
+.build
+
+# Python related
+__pycache__
+
 /ffi