feat(view): add buttons to jump through the changes

feat(view): add merge spacer styles

fix(view): include history plugin to enable related keybindings

feat(ui): display message if both sides are identical

feat(ui): display message if both sides are identical

feat(view): show additions and deletions count

refactor(view): proper way to set content and gutter height

fix(vectors): remove incorrect size multiplier for width

feat(ui): theme and other minor improvements

feat(a11y): improve accessibility

chore: minor cleanup and updates

feat(view): setup base layout and merge view

initial commit