Initial HerbAPI implementation

Rust/Axum REST API (herbapi-api) with PostgreSQL, S3/Garage, OIDC auth.
Dioxus 0.7 WASM frontend (herbapi-ui) with sidebar layout and botanical reference style.
9 SQL migrations covering families, species, cultivars, suppliers, companions, images, users, API tokens.

herbapi-ui/src/main.rs

@@ -0,0 +1,10 @@
+mod api;
+mod app;
+mod components;
+mod pages;
+mod types;
+
+fn main() {
+    console_error_panic_hook::set_once();
+    dioxus::launch(app::App);
+}