add ability to specify RGB colors as names from the X11 rgb name list

src/cli/action.zig

@@ -5,6 +5,7 @@ const list_fonts = @import("list_fonts.zig");
 const version = @import("version.zig");
 const list_keybinds = @import("list_keybinds.zig");
 const list_themes = @import("list_themes.zig");
+const list_colors = @import("list_colors.zig");
 
 /// Special commands that can be invoked via CLI flags. These are all
 /// invoked by using `+<action>` as a CLI flag. The only exception is
@@ -22,6 +23,9 @@ pub const Action = enum {
     /// List available themes
     @"list-themes",
 
+    /// List named RGB colors
+    @"list-colors",
+
     pub const Error = error{
         /// Multiple actions were detected. You can specify at most one
         /// action on the CLI otherwise the behavior desired is ambiguous.
@@ -62,6 +66,7 @@ pub const Action = enum {
             .@"list-fonts" => try list_fonts.run(alloc),
             .@"list-keybinds" => try list_keybinds.run(alloc),
             .@"list-themes" => try list_themes.run(alloc),
+            .@"list-colors" => try list_colors.run(alloc),
         };
     }
 };