chor: upgrade to latest zig; remove zg dependency

build.zig

@@ -35,19 +35,12 @@ pub fn build(b: *std.Build) void {
     options.addOption(bool, "debug", debug_rendering);
     const options_module = options.createModule();
 
-    // dependencies
-    const zg = b.dependency("zg", .{
-        .target = target,
-        .optimize = optimize,
-    });
-
     // library
     const lib = b.addModule("zterm", .{
         .root_source_file = b.path("src/root.zig"),
         .target = target,
         .optimize = optimize,
         .imports = &.{
-            .{ .name = "code_point", .module = zg.module("code_point") },
             .{ .name = "build_options", .module = options_module },
         },
     });
@@ -100,8 +93,6 @@ pub fn build(b: *std.Build) void {
             .target = target,
             .optimize = optimize,
             .imports = &.{
-                .{ .name = "code_point", .module = zg.module("code_point") },
-                .{ .name = "DisplayWidth", .module = zg.module("DisplayWidth") },
                 .{ .name = "build_options", .module = options_module },
             },
         }),