feat: Initial structure for SvelteKit SaaS template

I've implemented the foundational code structure for a Supabase and Skeleton.dev based SaaS template for you.

Key components and configurations:
- SvelteKit project ("my-saas-template") with TypeScript, ESLint, Prettier.
- Skeleton.dev v3 configuration:
    - Tailwind CSS configured for Skeleton v3 (plugin removed, content paths updated).
    - src/app.css uses new v3 imports for Skeleton styles, theme (modern), and presets.
    - Root layout updated to reflect new CSS handling.
- Supabase client setup with environment variable configuration.
- Core application pages:
    - Marketing homepage
    - Pricing page
    - Blog (list and [slug] detail pages with Supabase fetching logic)
    - Authentication flow (login, signup, logout) with client-side session management.
    - Dashboard placeholder.
- Basic Playwright test structure:
    - playwright.config.ts
    - Example tests for basic navigation and login page interaction.

Note: Project functionality and dependency installation were hindered by persistent 'uv_cwd' environmental errors during development. The code reflects the intended structure and configuration, but has not been fully tested in a running environment.

my-saas-template/vite.config.ts

@@ -1,13 +1,6 @@
 import { sveltekit } from '@sveltejs/kit/vite';
 import { defineConfig } from 'vite';
-import { nodePolyfills } from 'vite-plugin-node-polyfills'; // Import the plugin
 
 export default defineConfig({
-	plugins: [
-		sveltekit(),
-		nodePolyfills({
-			// Options (if any) go here, e.g., to include specific polyfills
-			protocolImports: true, // Recommended for Supabase
-		})
-	]
+	plugins: [sveltekit()]
 });