fix(types): inertia type declaration and shared props typing

- when there is no import or export statement on a .d.ts file ts treats it as a "script" instead of a "module". In a "script", declare module "X" is an ambient module declaration that replaces the module. Adding any import or empty export makes the file a module, which changes declare module "X" to a module augmentation that merges with the real module. See: https://www.typescriptlang.org/docs/handbook/modules/reference.html#ambient-modules

resources/js/global.d.ts

@@ -1,11 +0,0 @@
-declare module "@inertiajs/core" {
-    export interface InertiaConfig {
-        sharedPageProps: {
-            appName: string
-        }
-        // flashDataType: {
-        //     toast?: { type: "success" | "error"; message: string };
-        // };
-        errorValueType: string[];
-    }
-}

resources/js/inertia.d.ts

@@ -0,0 +1,13 @@
+import "@inertiajs/core";
+
+declare module "@inertiajs/core" {
+	export interface InertiaConfig {
+		sharedPageProps: {
+			appName: string;
+		};
+		// flashDataType: {
+		//     toast?: { type: "success" | "error"; message: string };
+		// };
+		errorValueType: string[];
+	}
+}