feat: basic home page

Created a basic home page with links, a header with a link to home, some basic reusable CSS classes.

ref: N25B-38

src/index.css

@@ -13,6 +13,16 @@
   -moz-osx-font-smoothing: grayscale;
 }
 
+html, body {
+  margin: 0;
+  padding: 0;
+
+  height: 100dvh;
+  width: 100dvw;
+  overflow-x: hidden;
+  overflow-y: scroll;
+}
+
 a {
   font-weight: 500;
   color: #646cff;
@@ -22,14 +32,6 @@ a:hover {
   color: #535bf2;
 }
 
-body {
-  margin: 0;
-  display: flex;
-  place-items: center;
-  min-width: 320px;
-  min-height: 100vh;
-}
-
 h1 {
   font-size: 3.2em;
   line-height: 1.1;