Add automatic link checks for Markdown files

[kenji-miyake]

It's useful we can detect dead links automatically.

Importing our proposal way can solve this.
https://github.com/tier4/AutowareArchitectureProposal.iv/blob/05c248e52f7ad930e30002d49fb545fc5d568abf/.pre-commit-config-optional.yaml#L16-L20

[kenji-miyake]

Resolved by #312