feat: initialize Svelte frontend with Vite and TypeScript

- Added package.json for project configuration and dependencies.
- Included images for the application (teh-jokur.png and vite.svg).
- Created main application structure with App.svelte, CounterCard.svelte, and AddCounterCard.svelte components.
- Implemented functionality for adding, editing, incrementing, and decrementing counters.
- Added clickOutside utility for handling outside clicks in editing mode.
- Configured TypeScript with appropriate tsconfig files for app and node.
- Set up Vite configuration for building the application.
- Added global styles in app.css for consistent UI design.

frontend/svelte.config.js

@@ -0,0 +1,8 @@
+import { vitePreprocess } from '@sveltejs/vite-plugin-svelte'
+
+/** @type {import("@sveltejs/vite-plugin-svelte").SvelteConfig} */
+export default {
+  // Consult https://svelte.dev/docs#compile-time-svelte-preprocess
+  // for more information about preprocessors
+  preprocess: vitePreprocess(),
+}