Some hardcoded icons depends on nerdfont

[Rubenduburck]

avante.nvim/lua/avante/sidebar.lua

Line 798 in 225e6f9

"󱜸 %s (" .. Config.mappings.sidebar.switch_windows .. ": switch focus)",

If this icon was pulled from the config instead, users without nerd font could set their own icon.
Now if I use this without support for this icon, it's drawn as a missing character.