Add Farsi Bigclock (#673)

* 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

res/config.ini

@@ -51,8 +51,11 @@ auth_fails = 10
 # Background color id
 bg = 0x0000
 
-# Enable/disable big clock
-bigclock = false
+# Change the state and language of the big clock
+# none -> Disabled (default)
+# en   -> English
+# fa   -> Farsi
+bigclock = none
 
 # Blank main box background
 # Setting to false will make it transparent