fix(service): Switch from flume to postage to fix out-of-order communication

plugins/src/web/config.ron

@@ -35,6 +35,10 @@
             matches: ["dev"],
             queries: [(name: "DEV Community", query: "dev.to/search?q=")],
         ),
+        (
+            matches: ["docs"],
+            queries: [(name: "Docs.rs", query: "docs.rs/")]
+        )
         (
             matches: ["fh"],
             queries: [(name: "Flathub", query: "flathub.org/apps/search/")]