docs: add sprite viewer help
docs: document spr format
chore: remove book links
docs: add additional resources
chore: move manual section
docs: add manual link
docs: add map/model viewer guides
chore: update modding resources link
feat: add textures link
feat: add link to Rivermod help
feat: add save manager help docs
Updated Rivermod Documentation (markdown)
Updated Home (markdown)
docs: update reference links
docs: clarify minimap color generation
docs: further document xy files
docs: document xy file discoveries
docs: update analysis status
docs: document remaining files
feat: add .COL and .RAW descriptions
docs: add missing file types
docs: add custom footer
docs: document additional notes
docs: add additional gameplay notes
docs: clarify last map row vertex heights
docs: clarify additional details
docs: clarify Setup directory contents
docs: explain setup directories