Dev 2.3 demo shell styling refactor

Big refactor of demo shell.

What's new:

Styling to match SciChart 2.3 / 2022 branding
Removed Description, Tips from each example. Keeping Subtitle
Changed gallery to load a 5xN grid (using flex: wrap) on large monitors. 3xN on small and 1xN on mobile
Removed lazy loading of images as we're no longer concerned about SEO load time. Added Tooltips
Removed all the heavy calls to action and instead contextually linked to the main example on scichart.com
Added for all examples to the main example on scichart.com
Added npm link to the top bar
Auto generated gallery cards on homepage from the menu items. The menu items is now the single source of truth for the left menu AND the gallery AND see also
See also gallery cards also auto-generated from menu items
Added contextual github link - at the top menu the github link changes depending on what example you're on
Attempted to add contextual documentation (WIP)

TODO

About 5 images are TODO UPDATE ME and examples require styling & images exported
Testing of examples as some outside of iframe dont behave right
Ensure search uses menu items as single source of truth so we dont have to maintain 3 or 4 lists in the app

ABTSoftware / SciChart.JS.Examples