feat(http/unstable): add RFC 9421 message signatures

http/_types.ts

@@ -0,0 +1,11 @@
+// Copyright 2018-2026 the Deno authors. MIT license.
+
+/**
+ * Proxy type of {@code Uint8Array<ArrayBuffer>} or {@code Uint8Array} in TypeScript 5.7 or below respectively.
+ *
+ * This type is internal utility type and should not be used directly.
+ *
+ * @internal @private
+ */
+
+export type Uint8Array_ = ReturnType<Uint8Array["slice"]>;

http/deno.json

@@ -19,6 +19,7 @@
     "./unstable-structured-fields": "./unstable_structured_fields.ts",
     "./user-agent": "./user_agent.ts",
     "./unstable-route": "./unstable_route.ts",
-    "./unstable-cache-control": "./unstable_cache_control.ts"
+    "./unstable-cache-control": "./unstable_cache_control.ts",
+    "./unstable-message-signatures": "./unstable_message_signatures.ts"
   }
 }