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/Dioxus.toml

@@ -0,0 +1,15 @@
+[application]
+name = "herbapi-ui"
+default_platform = "web"
+
+[web.app]
+title = "HerbAPI — Plant Database"
+
+[web.watcher]
+watch_path = ["src", "assets"]
+
+[web.resource.dev]
+style = ["/assets/herbapi.css"]
+
+[web.resource.release]
+style = ["/assets/herbapi.css"]