Refactor benchmark runner to store results in a nested dict keyed by language name, enabling per-benchmark result aggregation. Add bar chart HTML tables to doc/site/performance.markdown displaying method call, DeltaBlue, and binary trees benchmarks across languages. Include SCSS styles for chart layout, bar coloring, and main content padding.
Add `^category` front matter to all language, types, and reference doc pages for site navigation restructuring. Replace `:::wren` and `:::java` code block annotations with `:::dart` across multiple files. Create new stub pages for core-libraries, embedding-api, and contributing under the reference category. Remove the old embedding and getting-involved stub pages.
- Delete doc/site/style.css and add doc/site/style.scss with Sass variables, Dosis header font, box-sizing, absolute header positioning, and link hover effects
- Update template.html to reference Dosis font, lowercase nav headings, and change tagline to "a classy little scripting language"
- Add .sass-cache/ to .gitignore and rename Makefile phony target from docs to builtin
- Modify generate_docs.py to compile style.scss via sass subprocess instead of copying static CSS
- Tweak performance.markdown and qa.markdown for minor wording improvements
Fix two typos in doc/site/performance.markdown: change "rivalling" to "rivaling" in the paragraph about language implementation complexity, and change "carvinal" to "carnival" in the benchmarks section.
Create new doc/site/performance.markdown explaining Wren's position in the bytecode interpreter performance bucket and introducing NaN tagging for compact value storage. Also update doc/site/template.html to include a link to the new performance page in the "Other" navigation section.
