fix: move dayjs from devDependencies to dependencies

[svargas-dev]

Problem

dayjs and its plugins are imported at runtime in src/components/lib/date-utils.js but are only declared as a devDependency. This means consumers of this package cannot resolve dayjs via normal dependency resolution.

This was silently masked by pnpm v10's implicit hoisting behaviour, which leaked sub-package dev-deps into the workspace. After upgrading to pnpm v11 (which enforces strict dependency isolation), dashboard-sapper began failing immediately at startup:

Error: Cannot find module 'dayjs'
Require stack:
- apps/dashboard-sapper/__sapper__/dev/server/server.js

Fix

Move dayjs from devDependencies to dependencies and bump to 13.0.5.