docs(site): add a Remote Taskfiles feature card

Remote Taskfiles are the one thing Make, just and npm scripts cannot do,
and the homepage did not mention them anywhere. The wording stays on
including a Taskfile rather than running one, so it does not read as an
invitation to execute an arbitrary URL.

website/src/index.md

@@ -37,4 +37,10 @@ features:
     icon: 🎯
     details:
       Track sources and generated files to skip work that is already up to date.
+
+  - title: One Taskfile, every repo
+    icon: 🔗
+    details:
+      Include Taskfiles straight from a URL or a Git repo, so shared workflows
+      live in one place instead of being copy-pasted.
 ---