docs: add complex equation example to user guide
add a new image to gallery
update ui_preview image
update docs
fix link to user-guide
fix spacing
Updated Home (markdown)
Updated keybindings (markdown)
Updated gallery (markdown)
Updated docs (markdown)
update keybindings
add new docs image
update ui image
add UI preview image
fix typo
remove image
update gallery
add svg circle
change circle from svg to png
add links to download images
amend
convert gallery to pngs for better online performance
add png images
add new images