feat: add astyle config

.astyle-format

@@ -0,0 +1,22 @@
+style=java
+indent=spaces=4
+indent-modifiers
+attach-namespaces
+attach-classes
+attach-inlines
+attach-extern-c
+attach-closing-while
+indent-classes
+indent-switches
+indent-col1-comments
+attach-return-type
+attach-return-type-decl
+pad-oper
+pad-comma
+pad-header
+unpad-paren
+align-pointer=name
+break-one-line-headers
+convert-tabs
+close-templates
+break-after-logical