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

src/bigclock/Lang.zig

@@ -0,0 +1,23 @@
+const builtin = @import("builtin");
+
+pub const WIDTH = 5;
+pub const HEIGHT = 5;
+pub const SIZE = WIDTH * HEIGHT;
+
+pub const X: u32 = if (builtin.os.tag == .linux or builtin.os.tag.isBSD()) 0x2593 else '#';
+pub const O: u32 = 0;
+
+pub const LocaleChars = struct {
+    ZERO:   [SIZE]u21,
+    ONE:    [SIZE]u21,
+    TWO:    [SIZE]u21,
+    THREE:  [SIZE]u21,
+    FOUR:   [SIZE]u21,
+    FIVE:   [SIZE]u21,
+    SIX:    [SIZE]u21,
+    SEVEN:  [SIZE]u21,
+    EIGHT:  [SIZE]u21,
+    NINE:   [SIZE]u21,
+    S:      [SIZE]u21,
+    E:      [SIZE]u21,
+};