Improve homepage (#245)

* Improve how generators are listed on home

* Add some icons for generators

* Remove debug

* Refactor cachedFetch and use generated changelogs

* Add limit to how many changes are shown by default

* Add more generator icons

* Refactor cards

* Fix generator icons for light theme

* Add more worldgen icons

* Add remaining generator icons

* Refactor navigation and badges style

* Group on homepage for guides and tools

* Fix header button style

* Add versions and technical changelog to homepage

* Make it clear that not all changes could be documented

src/app/components/Card.tsx

@@ -0,0 +1,21 @@
+import type { ComponentChildren } from 'preact'
+
+interface Props {
+	title?: ComponentChildren,
+	link?: string,
+	overlay?: ComponentChildren,
+	children?: ComponentChildren,
+}
+export function Card({ title, overlay, link, children }: Props) {
+	const content = <>
+		{overlay && <span class="card-overlay">{overlay}</span>}
+		<div class="card-content">
+			{title && <h3 class="card-title">{title}</h3>}
+			{children}
+		</div>
+	</>
+
+	return link === undefined
+		?	<div class="card">{content}</div>
+		: <a class="card" href={link} >{content}</a>
+}