feat: improve window typings

Signed-off-by: Griko Nibras <griko@nibras.co>

window.d.ts

@@ -1,9 +1,24 @@
+/* eslint-disable @typescript-eslint/no-explicit-any */
+
+import { Cosmos } from "@cosmos-kit/cosmostation-extension/cjs/extension/types";
 import { Window as KeplrWindow } from "@keplr-wallet/types";
+import { WindowProvider } from "wagmi/window";
 
 declare global {
-  // eslint-disable-next-line no-unused-vars
   interface Window extends KeplrWindow {
-    okexchain?: any
-    ethereum?: any
+    cosmostation?: CosmostationWindow;
+    leap?: KeplrWindow["keplr"];
+
+    ethereum?: WindowProvider;
+    okexchain?: {
+      ethereum?: WindowProvider;
+    };
   }
 }
+
+interface CosmostationWindow {
+  cosmos: Cosmos;
+  providers: {
+    keplr: KeplrWindow["keplr"];
+  };
+}