Cleanup dependencies

[nix6839]

Summary

• Replace fs-extra to node built-in fs/promises
• Remove unused dependencies
• Upgrade dependencies as much as possible
• Turn off deprecated eslint rules to pass tests.

Dependencies that cannot be upgraded to the latest version:

• husky: Dropped support for Node 14 and 16 in v9.
• lint-staged: Drop support for Node.js 14 in v14 and Require at least Node.js 18.12.0 in v15.
• rollup: The minimal required Node version is now 18.0.0 in v4.
• @typescript-eslint/*: Node.js engine requirement to ^18.18.0 || >=20.0.0 and ESLint peer dependency requirement to ^8.56.0 in v7.
• prettier: Changed to be async-based in v3, making it incompatible with markdown-magic.
• is-html: This package is now pure ESM in v3.

Solutions for dependencies that cannot be upgraded to the latest version

This solutions includes breaking changes, so would like to hear your opinion @joshwilsonvu.

• @typescript-eslint/*, husky, lint-staged, rollup: Change the supported Node.js version to ^18.18.0 || >=20.0.0.
• @typescript-eslint/*: Change the supported ESLint version to ^8.56.0.
• prettier: Replace markdown-magic or use @prettier/sync
• is-html: It is only possible when we drop support for legacy configs in the future.

P.S. ESLint v9 has been released. IMO, it's a good time to drop support for versions below ESLint v8.57.0!