Restructure the native module

Consolidate all code into the src folder

native/src/core/lib.rs

@@ -0,0 +1,16 @@
+pub use base;
+pub use logging::*;
+
+mod logging;
+
+#[cxx::bridge]
+pub mod ffi {
+    extern "Rust" {
+        fn rust_test_entry();
+        fn android_logging();
+        fn magisk_logging();
+        fn zygisk_logging();
+    }
+}
+
+fn rust_test_entry() {}