feat: Implement gRPC Reflection Service (#340)

Co-authored-by: Samani G. Gikandi <[email protected]>

tonic-reflection/src/lib.rs

@@ -0,0 +1,26 @@
+//! A `tonic` based gRPC Server Reflection implementation.
+
+#![warn(
+    missing_debug_implementations,
+    missing_docs,
+    rust_2018_idioms,
+    unreachable_pub
+)]
+#![doc(
+    html_logo_url = "https://github.com/hyperium/tonic/raw/master/.github/assets/tonic-docs.png"
+)]
+#![doc(html_root_url = "https://docs.rs/tonic-reflection/0.1.0")]
+#![doc(issue_tracker_base_url = "https://github.com/hyperium/tonic/issues/")]
+#![doc(test(no_crate_inject, attr(deny(rust_2018_idioms))))]
+#![cfg_attr(docsrs, feature(doc_cfg))]
+
+pub(crate) mod proto {
+    #![allow(unreachable_pub)]
+    tonic::include_proto!("grpc.reflection.v1alpha");
+
+    pub(crate) const FILE_DESCRIPTOR_SET: &'static [u8] =
+        tonic::include_file_descriptor_set!("reflection_v1alpha1");
+}
+
+/// Implementation of the server component of gRPC Server Reflection.
+pub mod server;