Typescript has almost identical semantics to Javascript but adds typing syntax to improve developer experience and make it easier to manage a large-scale JS codebase.
Zig is a fundamentally different language than C that has a lot of new features. Two great examples are comptime and allocators which have complements in C, but are really very different from what C provides.
If you're suggesting that zig is aiming to provide a C alternative with better ergonomics, then I agree; but zig and C have a lot more differences than Typescript and Javascript.
Zig OTH is "just C" but with a modern syntax, much more correctness, comptime, reflection, generics, a rich standard library, an integrated build system, cross-compiling that 'just works'.
(I'm sure I forgot a couple of things)