feat: add models list endpoint

src/state/app_state.rs

@@ -0,0 +1,7 @@
+use crate::providers::ollama::OllamaProvider;
+use std::sync::Arc;
+
+#[derive(Clone)]
+pub struct AppState {
+    pub ollama: Arc<OllamaProvider>,
+}

src/state/mod.rs

@@ -0,0 +1 @@
+pub mod app_state;