Deep/eng 3060 code blocks line highlighting

[deep93333]

Summary

• Update the dependencies to latest release (next-mdx-remote, mdx.js, rehype and remark plugins)
• Add support for code line highlight and also made changes to examples accordingly.
• Applied prettier using @mintlify/prettier-config

Example

Test plan

To locally test this package in mint we need to link this project. To link this project i was using https://github.com/wclr/yalc i was struggling to link with yarn or npm. I found out mint project uses yarn 3 while mdx repo is using yarn 1 so there was compatibility issue.

1. Install yalc globally

yarn global add yalc

2. Publish it from mdx project

yalc publish

3. Link it to mint project

yalc link @mintlify/mdx

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[dks333]

Quick question (might not be included in the initial design): Do we need to highlight codes without languages being specified?