chore(avante): set auto_suggestion option to false

avante.nvim has a hidden keybinding that I haven't found yet that I
activated on accident once and couldn't deactivate that turns on auto
suggestions. Needless to say that using Claude 3.7 for live suggestions
is a bad idea. Not thank you to avante for that (on top of that the
suggestion system was broken so I wasn't really getting any suggestions
it was just consuming a LOT of tokens for nothing)

lua/custom/plugins/avante.lua

@@ -9,6 +9,9 @@ return {
 				insert = "<C-s>"
 			}
 		},
+		behaviour = {
+			auto_suggestions = false,
+		},
 		windows = {
 			width = 45,
 			sidebar_header = {