Presentation Style Refresh

[EWSoftware]

Create a new presentation style that addresses the issues with the current Default2022 presentation style. The changes will be made in phases.

• [X] Update the styles and layout as needed. Add support for light and dark themes and switching between them.
• [X] Omit the ASPX and PHP files. They likely aren't needed anymore and PHP support was never fully implemented in the Default2022 style.
• [X] Improve the search option to provide better search capabilities and results that show the topic titles and a brief summary of the content. Replaces #929.
• [ ] Make adjustments to the page template to prevent issues with the topic content overlaying the In This Article list and fix up some other issues with layout in general.
• [ ] Rework how the TOC is handled to reduce or eliminate the large number of TOC files generated for large projects. For small projects it may be possible to create a single file if the number of topics is below a certain threshold. For larger projects, perhaps segregate by namespace and/or type to keep the number of files generated to a minimum. Replaces #1104.
• Make other changes based on user feedback.