Introduce notion of "marketing_url" / "homepage"

[tadasant]

See conversation: #130 (comment)

The use case that makes sense to me would be a "landing page URL" like https://zapier.com/mcp.

We should discuss what the right naming would be for this, as url is clearly too ambiguous (that is evident even from just this conversation). Some options:

• landing_page_url
• marketing_url
• learn_more_url
• more_information
• canonical_url

And maybe we would require this URL to match the reverse DNS verification in name.

@jonathanhefner noted:

Another option is homepage. That's what NPM (example) and RubyGems (example) use, at least when displayed.

And maybe we would require this URL to match the reverse DNS verification in name.

This might be too onerous a requirement. I can imagine someone wanting to switch to a new domain after the fact. (Gotta grab that new .ai TLD! 🔥)

[tadasant]

Relevant to this SEP that is landing: modelcontextprotocol/modelcontextprotocol#973 (comment)

We should probably align with naming used there (websiteUrl)