Add Savee remote MCP server

[ramonfritsch]

Savee is a curated visual inspiration library. This adds the hosted Streamable HTTP MCP (https://mcp.savee.com/mcp, OAuth 2.1 + PKCE, read-only) using the official registry name com.savee/savee. Docs: https://docs.savee.com/mcp

[blkt]

Thanks for the submission, and for the thorough README — the tool docs and the OAuth write-up made this easy to verify. I confirmed the endpoint is live and speaks MCP properly (correct WWW-Authenticate challenge and valid /.well-known/oauth-protected-resource), and all seven declared tools match your docs exactly.

A few things to sort out before this can merge — all mechanical:

1. description is too long. It's 132 chars; the schema caps it at 100, so task catalog:validate currently fails on this entry. Something like Read-only hosted MCP for Savee: saves, boards, feed, and search of its curated library. (86) would fit.
2. Namespace. This registry normalizes every entry to io.github.stacklok/<name>, so please use io.github.stacklok/savee. Your upstream com.savee/savee name is correct for the MCP registry — it's just a different convention here.
3. Icon. Needs a top-level icons block plus an icon.svg committed alongside server.json:

   "icons": [
     {
       "src": "https://raw.githubusercontent.com/stacklok/toolhive-registry/main/registries/toolhive/servers/savee/icon.svg",
       "mimeType": "image/svg+xml",
       "sizes": ["any"]
     }
   ]

4. overview is missing from the _meta extension block — a ## Savee MCP Server heading followed by 3–5 sentences. See registries/toolhive/servers/canva/server.json for the shape.

Two optional notes: it'd be worth mentioning in the overview that the service needs an active Savee subscription, and since you're the platform owner you're welcome to set tier: Official if you'd prefer — Community is perfectly fine too.

Happy to re-review as soon as you've pushed. Thanks again!