Make all colors u16

Signed-off-by: AnErrupTion <anerruption@disroot.org>

src/config/Config.zig

@@ -11,7 +11,7 @@ asterisk: ?u8 = '*',
 bg: u16 = 0,
 bigclock: bool = false,
 blank_box: bool = true,
-border_fg: u8 = 8,
+border_fg: u16 = 8,
 box_title: ?[]const u8 = null,
 clear_password: bool = false,
 clock: ?[:0]const u8 = null,
@@ -20,7 +20,7 @@ default_input: Input = .login,
 error_bg: u16 = 0,
 error_fg: u16 = 258,
 fg: u16 = 8,
-cmatrix_fg: u8 = 3,
+cmatrix_fg: u16 = 3,
 hide_borders: bool = false,
 hide_key_hints: bool = false,
 initial_info_text: ?[]const u8 = null,

src/tui/TerminalBuffer.zig

@@ -16,7 +16,7 @@ height: usize,
 buffer: [*]termbox.tb_cell,
 fg: u16,
 bg: u16,
-border_fg: u8,
+border_fg: u16,
 box_chars: struct {
     left_up: u32,
     left_down: u32,