Refresh homepage

[markrandall]

Self(ish) contained landing page.

Changes since earlier previews:

• Removed top set of navigation cards until we have more pages in place
• Swaps out elephpant logo for Levi's PHP logo
• Changed styling mechanism for light and dark mode using css selectors (not the toggle).
• Removed large buttons on every card, uses a combination of hover / select effects, with a top-right icon to indicate the whole card is clickable.
• Used javascript to dynamically resize cards in display: flex so non-full lines will center-align.
• Wraps backticks in <code>...</code> blocks where applicable.

Areas I'm not quite happy with:

• Button focus styles.
• Need to get something better for github logo or update ClickableCard renderer to allow directly injecting SVG.

Notes:

• Includes Add phpstan type to NewsHandler #1932 and [Preview - Part 1] Eliminate globals for $RELASES / $OLDRELEASES / $BRANCHES #1931
• Included an updated pregen-news.inc for newer events copied from prod - This accounts for the vast majority of the line count.

[theodorejb]

Can the PHP 8.5 feature highlights include <code> tags around attributes (#[\NoDiscard]), functions (clone()), and operators (|>) like the PHP 8.5 release page does for better readability?

[markrandall]

Can the PHP 8.5 feature highlights include <code> tags around attributes (#[\NoDiscard]), functions (clone()), and operators (|>) like the PHP 8.5 release page does for better readability?

Done.