Feat: Option for 24-hour and 12-hour toggle

[kdh8219]

Describe the problem

24-Hour is cool
Makes it more intuitive to see the time at 0 and 12 o'clock

Describe the solution you'd like

make an option or use system option for time fromat

Alternatives considered

No response

Additional context

cinny/src/app/utils/time.ts

Line 12 in 689adde

export const timeHourMinute = (ts: number): string => dayjs(ts).format('hh:mm A');

[kfiven]

duplicate of #60