It doesn't matter what framework or package manager you are using. Installing WDS Shadcn components is as simple as running the pnpm dlx shadcn-svelte@latest add https://wds-shadcn-registry-svelte.netlify.app/registry/<component>.json command and replacing <component> with the name of the component you want to install.
The entire install process is handled by the shadcn-svelte CLI tool and works identically to how you would install any other Shadcn component.