NBA Quarto Templates version 2

Updates to templates

1. Rearrangement of project folder to separate sections contributors should edit from other supporting files.
2. Expanded and improved usage notes and instructions - READMEs and comments within templates.
3. Development of html partials to customize author-affiliation block.
4. Development of custom page citation function (requires reinstallation of nbaR).
5. Development of a custom csl file representing SANBI bibliography format.
6. Various customizations to scss to address styling issues:
   • Figure and Table captions
   • Notation of footnotes
   • Styling of affiliations text