Add types for js globals (#31586)

Adds types for `window.config` and jQuery/htmx globals, eliminating 48
`tsc` errors.

types.d.ts

@@ -2,3 +2,17 @@ declare module '*.svg' {
   const value: string;
   export default value;
 }
+
+declare let __webpack_public_path__: string;
+
+interface Window {
+  config: import('./web_src/js/types.ts').Config;
+  $: typeof import('@types/jquery'),
+  jQuery: typeof import('@types/jquery'),
+  htmx: typeof import('htmx.org'),
+}
+
+declare module 'htmx.org/dist/htmx.esm.js' {
+  const value = await import('htmx.org');
+  export default value;
+}