feat: add delta diff viewer

gitconfig

@@ -9,6 +9,16 @@
   excludesfile = ~/.gitignore
   legacyheaders = false
   whitespace = trailing-space,space-before-tab
+  pager = delta
+[interactive]
+  diffFilter = delta --color-only
+[add.interactive]
+  useBuildtin = false
+[delta]
+  navigate = true
+  light = false
+  line-numbers = true
+  syntax-theme = Dracula
 [alias]
   st = status
   ci = commit
@@ -62,11 +72,13 @@
 [diff]
   tool = Kaleidoscope
   algorithm = patience
+  colorMoved = default
 [difftool]
   prompt = false
 [difftool "Kaleidoscope"]
   cmd = ksdiff --partial-changeset --relative-path \"$MERGED\" -- \"$LOCAL\" \"$REMOTE\"
 [merge]
+  conflictstyle = diff3
   tool = Kaleidoscope
 [mergetool]
   prompt = false