Update npm dependencies to latest major versions

Bump astro 5→6, @astrojs/node 9→10, typescript 5→6, esbuild-wasm 0.27→0.28,
and minor updates for tailwindcss, playwright, and @types/node.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

Author: GeekTrainer