rename: eval-datasets-from-traces -> golden-datasets-from-traces

[SuhaniNagpal7]

Pull Request

Description

URL slug rename to match the renamed product concept (eval dataset → golden dataset).

• Renames the cookbook page slug cookbook/falcon-ai/eval-datasets-from-traces → cookbook/falcon-ai/golden-datasets-from-traces
• File renamed via git mv so file history is preserved (GitHub shows 85% similarity on the rename)
• Updates the cookbook nav entry in src/lib/navigation.ts to point at the new slug
• Updates internal href references in falcon-ai/context-aware-debugging.mdx and falcon-ai/end-to-end.mdx (the two cookbooks that link to the renamed page in their "Explore further" cards)
• The page title ("Building Golden Datasets from Production Traces with Falcon AI") and prose were already updated in a previous PR; this PR is the URL slug catch-up
• Colab + GitHub badge URLs inside the renamed file updated to the new path

Companion change in the cookbooks repo (notebook + cross-reference slug updates) shipped on cookbook/falcon-ai-page as commit 3d13024.

Checklist

• Code compiles correctly.
• Created/updated tests. (N/A: docs-only rename, no test surface)
• Linting and formatting applied.
• Documentation updated.

Related Issues

N/A: ad-hoc rename driven by product terminology change.