Added P,A,M characters to bigclock and added 12hr and seconds support to bigclock via `bigclock_12hr` and `bigclock_seconds` in the config.

Image has bigclock_12hr and bigclock_seconds enabled.
Farsi characters for P,A,M are blank since I don't know what it would look like in their language. (should i have just used the english characters as a placeholder?)
Reviewed-on: https://codeberg.org/fairyglade/ly/pulls/805
Reviewed-by: AnErrupTion <anerruption@disroot.org>
Co-authored-by: RadsammyT <radsammyt@gmail.com>
Co-committed-by: RadsammyT <radsammyt@gmail.com>
* Change config type for bigclock
* Seprates big clock's hard codes from its logic
* Adds Farsi (fa) to big clock langs
* Minor changes
* Makes requested changes