Add a `responseType` quick table to the REST guide

[TDanks2000]

Background:
The REST guide documents responseType and binary responses. A compact table
would help users choose between auto, json, text, arrayBuffer, and
blob.

Proposed change:
Add a table near the response parsing section showing each supported
responseType, what it returns, and when to use it.

Acceptance criteria:

• docs/guides/rest-requests.md lists all supported response types.
• The table includes one practical use case per response type.
• Existing binary response guidance remains intact.
• No source code changes are required.

Files likely involved:

• docs/guides/rest-requests.md
• src/client/BaseHttpClient.ts for source reference only