Add pre-flight checks for zed and deno commands

- Check for zed command availability before extension load
- Verify deno command is installed
- Provide user-friendly error toasts if commands are missing
- Bump package version to 0.0.3

package.json

@@ -1,7 +1,7 @@
 {
   "$schema": "https://schema.kunkun.sh",
   "name": "kunkun-ext-zed",
-  "version": "0.0.2",
+  "version": "0.0.3",
   "license": "MIT",
   "type": "module",
   "repository": {

src/index.ts

@@ -84,6 +84,24 @@ function openWithZed(path: string) {
 
 class ExtensionTemplate extends TemplateUiCommand {
   async load() {
+    shell.hasCommand("zed").then((hasCommand) => {
+      if (!hasCommand) {
+        toast.error(
+          "zed command not installed to PATH, please install it the 'zed' command."
+        );
+        return ui.goBack();
+      }
+    });
+
+    shell.hasCommand("deno").then((hasCommand) => {
+      if (!hasCommand) {
+        toast.error(
+          "This extension requires the 'deno' command to be installed to PATH, but not detected."
+        );
+        return ui.goBack();
+      }
+    });
+
     ui.setSearchBarPlaceholder(
       "Enter a search term, and press enter to search"
     );