Added axum-gate to ECOSYSTEM.md (#3538)

Author: emirror-de

ECOSYSTEM.md

@@ -29,6 +29,7 @@ If your project isn't listed here and you would like it to be, please feel free
 - [axum-typed-routing](https://docs.rs/axum-typed-routing/latest/axum_typed_routing/): Statically typed routing macros with OpenAPI generation using aide.
 - [axum-jsonschema](https://docs.rs/axum-jsonschema/): A `Json<T>` extractor that does JSON schema validation of requests.
 - [axum-login](https://docs.rs/axum-login): Session-based user authentication for axum.
+- [axum-gate](https://docs.rs/axum-gate): JWT-based authentication and role-based authorization for axum (Cookie and Bearer, for monolithic and distributed applications).
 - [axum-csrf-sync-pattern](https://crates.io/crates/axum-csrf-sync-pattern): A middleware implementing CSRF STP for AJAX backends and API endpoints.
 - [axum-otel-metrics](https://github.com/ttys3/axum-otel-metrics/): A axum OpenTelemetry Metrics middleware with prometheus exporter supported.
 - [tower-otel](https://github.com/mattiapenati/tower-otel): OpenTelemetry layer for HTTP/gRPC services with optional axum integration.