fix(language-service): read vueCompilerOptions from generated root

Author: KazariEX

packages/language-service/lib/plugins/vue-document-drop.ts

@@ -24,10 +24,8 @@ export function create(
 			documentDropEditsProvider: true,
 		},
 		create(context) {
-			let casing = TagNameCasing.Pascal as TagNameCasing; // TODO
-
 			const tsPluginClient = getTsPluginClient?.(context);
-			const vueCompilerOptions = context.project.vue!.compilerOptions;
+			let casing = TagNameCasing.Pascal as TagNameCasing; // TODO
 
 			return {
 				async provideDocumentDropEdits(document, _position, dataTransfer) {
@@ -53,7 +51,7 @@ export function create(
 							importUri = item.value as string;
 						}
 					}
-					if (!importUri || !vueCompilerOptions.extensions.some(ext => importUri.endsWith(ext))) {
+					if (!importUri || !root.vueCompilerOptions.extensions.some(ext => importUri.endsWith(ext))) {
 						return;
 					}