Add a link checker

[nuke-web3]

Noticed a few broken links in #1861 and think a CI (and local dev) tool would help a lot in avoiding this in the future.
I quite like https://lychee.cli.rs/ as a fast and fun tool for local checks & CI (with caching enabled) with something like this config:

# saved in ./lychee.toml
cache = true
exclude_all_private = true
exclude_path = ["./node_modules"]
max_cache_age = "10d"
max_redirects = 10
max_retries = 3

exclude = [
    # rate limited / 403 / 503 / whatever
    "https://explorer.celestia-arabica-11.com/",
    "https://arabica.celenium.io/",
    "https://sepolia.arbiscan.io/",
    "https://arbiscan.io/",
    "https://basescan.org/",
    "https://sepolia.basescan.org/",
    "https://celenium.io/",
    "https://mocha.celenium.io",
    "https://mocha-4.celenium.io/",
    "https://celestia-testnet-api.itrocket.net/",
    "https://platform.openai.com/",
    "https://analytics.smartstake.io/",
    # skip any templates used in URLs for `.vitepress/components/*.vue`
    # matches "{.*}" literals in URLs
    '\%7B.*\%7D',
]

(And add .lycheecache to .gitignore ofc)

[nuke-web3]

Sadly though .vitepress/config.ts has some links that I think lychee cannot check It can actually! lychee .vitepress/config.ts works, TBD how to config explicit path incusions in the config file though...

I started my link fixin' adventure noticing the glossary in the side nav bar was a 404... 🤔 would want to check those too if at all possible.

[jcstein]

definitely interested in having this added!