feat(editor): s jumps to the subscription field

src/lib/components/editor/Editor.svelte

@@ -59,6 +59,7 @@
     ["m", "amount", "amount"],
     ["c", "category", "category"],
     ["b", "budget", "budget"],
+    ["s", "bill", "subscription"],
     ["#", "tags", "tags"],
     ["r", "notes", "notes"],
   ];