Fix Navic lualine text color so it better matches the overall theme.
Also changed the indentscope outline color to rosewater and enabled some
extra catppuccin theming settings.
Configured Navic and integrated it with Lualine. This provides context
about the code that is being worked on.
Also added a PAT to be able to create a PR when the Flake Update Github
action runs.
Updated some plugins to use custom git and diagnostic symbols, also
changed the line number color to match my system highlight color
(catppuccin peach).
