#376 fix(developer): print each result header once as kind, title and URL

firecrawl developer now prints each result header once: the kind, the title, then the URL. The full id is gone from readable output and stays in --json.

-## [issue:tobymao/sqlglot#7059] (issue) PostgreSQL GIN index with jsonb_path_ops operator class parsed as table#7059
+## [issue] PostgreSQL GIN index with jsonb_path_ops operator class parsed as table#7059
 https://github.com/tobymao/sqlglot/issues/7059

-## [doc:https://kinsta.com/blog/react-useeffect/] (doc) Demystifying React’s useEffect Hook
+## [doc] Demystifying React’s useEffect Hook
+https://kinsta.com/blog/react-useeffect/

The numbers come from replaying 102 saved responses through the old and new builds and counting o200k tokens per response:

Response mix	Before (p50 / p90)	After (p50 / p90)	Saved per response, mean
Doc, issue and repo results only	3,247 / 4,016	3,197 / 3,950	52 (1.6%)
With web results	1,558 / 2,646	1,552 / 2,609	12 (0.7%)

Web rows gain about 1 token each, because the URL now gets its own line next to the [web] label. The developer-index skill now describes the readable format.

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Summary by cubic

Changes firecrawl developer readable output so each result prints the kind, title, and URL once, instead of the full id. The full id now appears only in --json.

• Result headers render as ## [kind] title followed by the URL on its own line; web: is now a documented artifact kind and is not a types value.
• Replaying 102 saved responses, tokens drop slightly: ~52 per doc/issue/repo response (1.6%) and ~12 per response with web results (0.7%).
• Web rows gain about 1 token each because the URL moves to its own line; the developer-index skill now describes the readable format.