feat(core): move config types to public config module

Refactor program configuration types into a dedicated public `config`
module under `mingling_core`, making `StructuralRendererSetting`
accessible via `mingling_core::config` instead of the crate root.

Update all internal references and setup modules to use the new
`config::` path convention.

1 files changed, 1 insertions, 1 deletions

diff --git a/docs/pages/other/features.md b/docs/pages/other/features.md
index ac9d5db..7615118 100644
--- a/docs/pages/other/features.md
+++ b/docs/pages/other/features.md
@@ -195,7 +195,7 @@ fn handle_state_prev1(_p: StatePrev1) -> Next {
 
 ```rust
 // Features: ["extras"]
-use mingling::{ErrorOutput, macros::program_setup, Program};
+use mingling::{config::ErrorOutput, macros::program_setup, Program};
  
 fn main() {
     let mut program = ThisProgram::new();