chore: add @sveltejs/vite-plugin-svelte to explorer dependencies

Author: ota-meshi

explorer-v2/package.json

@@ -25,6 +25,7 @@
 	"devDependencies": {
 		"@sveltejs/adapter-static": "^3.0.0",
 		"@sveltejs/kit": "^2.0.0",
+		"@sveltejs/vite-plugin-svelte": "^3.0.1",
 		"prettier": "^3.1.1",
 		"prettier-plugin-svelte": "^3.1.2",
 		"string-replace-loader": "^3.1.0",