Add new styles for home and landing pages

- Created home.css with comprehensive styles for the home page layout, including typography, buttons, and responsive design adjustments.
- Created landing.css to style the landing page, focusing on typography, layout, and responsive behavior for various screen sizes.

src/index.html

@@ -4,6 +4,7 @@
     <meta charset="UTF-8" />
     <meta name="viewport" content="width=device-width, initial-scale=1.0" />
     <title>Minabot</title>
+    <meta name="description" content="A quiet place to track your habits and see your progress. Explore Minabot’s interactive habit calendars and connect with Discord." />
     <script type="module" src="./frontend.tsx" async></script>
   </head>
   <body>