chore: add schema

Author: KazariEX

Diff for: packages/language-core/schemas/vue-tsconfig.schema.json

@@ -60,6 +60,11 @@
 					"default": false,
 					"markdownDescription": "Check unknown components. If not set, uses the 'strictTemplates' value."
 				},
+				"strictCssModules": {
+					"type": "boolean",
+					"default": false,
+					"markdownDescription": "Strict CSS modules type-checking."
+				},
 				"skipTemplateCodegen": {
 					"type": "boolean",
 					"default": false,