Vim mode (#197)

Fixes #149: vim mode

common/deps.ts

@@ -44,7 +44,7 @@ export {
 
 export type { NodeType, SyntaxNode, SyntaxNodeRef, Tree } from "@lezer/common";
 
-export { searchKeymap } from "https://esm.sh/@codemirror/search@6.2.3?external=@codemirror/state,@codemirror/view";
+export { searchKeymap } from "@codemirror/search";
 export {
   Decoration,
   drawSelection,

common/util.ts

@@ -33,7 +33,12 @@ export function parseYamlSettings(settingsMarkdown: string): {
     return {};
   }
   const yaml = match[1];
-  return YAML.parse(yaml) as {
-    [key: string]: any;
-  };
+  try {
+    return YAML.parse(yaml) as {
+      [key: string]: any;
+    };
+  } catch (e: any) {
+    console.error("Error parsing SETTINGS as YAML", e.message);
+    return {};
+  }
 }