chore(deps): update dependencies to latest semver-compatible versions

Updated: @astrojs/check, @astrojs/mdx, @typescript-eslint/*,
astro, autoprefixer, eslint, eslint-plugin-astro, fs-extra,
nodemon, postcss, prettier, rimraf, rollup, sass, terser.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Author: puikinsh