shadcn: init at 2.0.3

[GetPsyched]

Description of changes

Adds the newly released ShadCN CLI.
Docs: https://ui.shadcn.com/docs/cli

Things done

• Built on platform(s)
  • x86_64-linux
  • aarch64-linux
  • x86_64-darwin
  • aarch64-darwin
• For non-Linux: Is sandboxing enabled in nix.conf? (See Nix manual)
  • sandbox = relaxed
  • sandbox = true
• Tested, as applicable:
  • NixOS test(s) (look inside nixos/tests)
  • and/or package tests
  • or, for functions and "core" functionality, tests in lib/tests or pkgs/test
  • made sure NixOS tests are linked to the relevant packages
• Tested compilation of all packages that depend on this change using nix-shell -p nixpkgs-review --run "nixpkgs-review rev HEAD". Note: all changes have to be committed, also see nixpkgs-review usage
• Tested basic functionality of all binary files (usually in ./result/bin/)
• 24.11 Release Notes (or backporting 23.11 and 24.05 Release notes)
  • (Package updates) Added a release notes entry if the change is major or breaking
  • (Module updates) Added a release notes entry if the change is significant
  • (Module addition) Added a release notes entry if adding a new NixOS module
• Fits CONTRIBUTING.md.

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[donovanglover]

Nix code LGTM

.cache/nixpkgs-review/pr-340035-1 ❄️ >>> time shadcn --version
2.0.3

________________________________________________________
Executed in  670.43 millis    fish           external
   usr time  727.78 millis    0.00 micros  727.78 millis
   sys time  277.05 millis  886.00 micros  276.16 millis

[GetPsyched]

Added a version test.

Not sure why it takes long as it does, it's likely to do something with upstream maybe.