Support color palettes in the config

Fixes #6

src/DisplayOptions.zig

@@ -17,6 +17,8 @@ show_ascii: bool,
 skip_lines: bool,
 /// Override the binary parser that is used
 parser: ?hevi.Parser = null,
+/// The color palette to use (ignored if `color` is `false`)
+palette: hevi.ColorPalette = hevi.default_palette,
 
 pub const OptionString = struct {
     is_allocated: bool = false,

src/hevi.zig

@@ -70,7 +70,8 @@ pub const PaletteColor = enum {
 /// A color palette, that associates `PaletteColor`s to `TextColor`s
 pub const ColorPalette = std.enums.EnumFieldStruct(PaletteColor, TextColor, null);
 
-const palette: ColorPalette = .{
+/// The default color palette
+pub const default_palette: ColorPalette = .{
     .normal = .{ .base = .yellow, .dim = false },
     .normal_alt = .{ .base = .yellow, .dim = true },
     .c1 = .{ .base = .red, .dim = false },
@@ -300,7 +301,7 @@ pub fn dump(allocator: std.mem.Allocator, data: []const u8, writer: std.io.AnyWr
 
     for (colors, text_colors) |color, *text_color| {
         text_color.* = switch (color) {
-            inline else => |c| @field(palette, @tagName(c)),
+            inline else => |c| @field(options.palette, @tagName(c)),
         };
     }
 

src/options.zig

@@ -56,6 +56,7 @@ pub fn getOptions(allocator: std.mem.Allocator, args: argparse.ParseResult, stdo
             show_ascii: ?bool = null,
             skip_lines: ?bool = null,
             parser: ?hevi.Parser = null,
+            palette: ?hevi.ColorPalette = null,
 
             comptime {
                 std.debug.assert(std.meta.fields(@This()).len == std.meta.fields(hevi.DisplayOptions).len);