Add a catalog adapter (vendor-official or community)

Use this to list a third-party adapter in the Chat SDK catalog and docs. It is not for building a first-party packages/adapter-* package.

Gather the source — never invent details

Ask the user for:

1. Their adapter's GitHub repository URL.
2. Their docs or README.

Read both. Everything you write into the catalog and docs must come directly from those sources or from the user. Do not assume or guess any information:

• packageName — read it from the repo's package.json, verbatim.
• Factory export (e.g. createFooAdapter) — read it from the package's exports/source. Do not guess it from the display name.
• type (platform or state), env vars, and the feature matrix — base these on what the code and README actually document.
• Install and usage snippets — take them from the README; do not write example code the adapter may not support.

If the repo or README does not make something clear, stop and ask the user rather than filling it in. When in doubt, ask.