pkgs: Remove Umami analytics from all packages

Umami analytics retired — the server laptop that was running it is no longer in use. Removed the Umami script tag from all web packages in the monorepo: - bismuth-web/src/routes/+layout.svelte - malachite-web/src/routes/+layout.svelte - jasper-web/src/routes/+layout.svelte - opal-web/src/routes/+layout.svelte - croft-click/src/routes/+layout.svelte - jasper/PRIVACY.md (Umami reference in privacy policy) Part of the @ewanc26/pkgs monorepo.