feat(status): add percentage ram module

[davidk55]

since tmux-cpu already supports ram usage we could just use that

[tiger0922]

Refer to dreknix's configuration, his configuration allows the memory module changes its color based on the percentage. It is more aligned with the current style of cpu.conf, maybe we can consider this style?

But it does need more tests, so if you want to keep it simple, you can just ignore my suggestion.

set -gq '@ram_low_bg_color' '#{E:@thm_green}'
set -gq '@ram_medium_bg_color' '#{E:@thm_yellow}'
set -gq '@ram_high_bg_color' '#{E:@thm_red}'

set -gq "@catppuccin_${MODULE_NAME}_icon" ' '
set -gq "@catppuccin_${MODULE_NAME}_color" '#{l:#{ram_bg_color}}'
set -gq "@catppuccin_${MODULE_NAME}_text" '#{l:#{ram_percentage}}'