switch from keyd to kanata

more reliable, doesn't break on update. also allows the escape key to
timeout and turn into lctrl after 1 second, which might be nicer
behavior

modules/nixos/graphical/polybar.nix

@@ -209,12 +209,6 @@
             label-foreground = config.theme.colors.base06;
             # format-background = colors.background;
           };
-          "module/keyboard" = {
-            type = "custom/text";
-            content = "󰌌";
-            click-left = "doas systemctl restart keyd";
-            content-foreground = config.theme.colors.base04;
-          };
           "module/power" = {
             type = "custom/text";
             content = "  ";