Reorder sections in Home page
Add Environment-variables page
Updated Home (markdown)
Add next & previous navigation links to bottom of pages Co-authored-by: Copilot
Add GH issues entry to TOC
Small tweaks
Rename page for CLI and Backward compatibility; adjust TOC hierarchy
Add page Generating-synthetic-training-data
Add Backends page
Hierarchical TOC
Add link to language detection page
Remove Maui and vw backends from TOC
Add SVC to backends list
Add YAKE backend
Add MLLM page to the backend list
remove link to vw_ensemble as it was dropped in 0.45