feat: Add Any protobuf type

proto/src/protobuf.rs

@@ -54,3 +54,44 @@ pub struct Duration {
     #[prost(int32, tag = "2")]
     pub nanos: i32,
 }
+
+/// `Any` contains an arbitrary serialized protocol buffer message along with a
+/// URL that describes the type of the serialized message.
+///
+/// Protobuf library provides support to pack/unpack Any values in the form
+/// of utility functions or additional generated methods of the Any type.
+#[derive(Clone, PartialEq, ::prost::Message, ::serde::Deserialize, ::serde::Serialize)]
+pub struct Any {
+    /// A URL/resource name that uniquely identifies the type of the serialized
+    /// protocol buffer message. This string must contain at least
+    /// one "/" character. The last segment of the URL's path must represent
+    /// the fully qualified name of the type (as in
+    /// `path/google.protobuf.Duration`). The name should be in a canonical form
+    /// (e.g., leading "." is not accepted).
+    ///
+    /// In practice, teams usually precompile into the binary all types that they
+    /// expect it to use in the context of Any. However, for URLs which use the
+    /// scheme `http`, `https`, or no scheme, one can optionally set up a type
+    /// server that maps type URLs to message definitions as follows:
+    ///
+    /// * If no scheme is provided, `https` is assumed.
+    /// * An HTTP GET on the URL must yield a \[google.protobuf.Type\]\[\]
+    ///   value in binary format, or produce an error.
+    /// * Applications are allowed to cache lookup results based on the
+    ///   URL, or have them precompiled into a binary to avoid any
+    ///   lookup. Therefore, binary compatibility needs to be preserved
+    ///   on changes to types. (Use versioned type names to manage
+    ///   breaking changes.)
+    ///
+    /// Note: this functionality is not currently available in the official
+    /// protobuf release, and it is not used for type URLs beginning with
+    /// type.googleapis.com.
+    ///
+    /// Schemes other than `http`, `https` (or the empty scheme) might be
+    /// used with implementation specific semantics.
+    #[prost(string, tag = "1")]
+    pub type_url: crate::String,
+    /// Must be a valid serialized protocol buffer of the above specified type.
+    #[prost(bytes = "bytes", tag = "2")]
+    pub value: crate::Vec<u8>,
+}