feat: add broadcasts.clicked_links() method

[dielduarte]

Adds GET /broadcasts/{id}/clicked-links — paginated list of a broadcast's clicked links (url, clicks, unique_clicks).

Spec: resend/resend-openapi#95
Reference implementation: resend/resend-node#1077

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Summary by cubic

Adds resend.Broadcasts.clicked_links() and clicked_links_async() to list a broadcast’s clicked links from GET /broadcasts/{id}/clicked-links, enabling retrieval of URL, total clicks, and unique clicks with cursor pagination.

• Defines ClickedLink and Broadcasts.ListClickedLinksResponse (object, data, has_more) with optional limit, after, and before; exports ClickedLink from resend.__init__.
• Uses PaginationHelper for cursorized paths; adds sync/async tests and NoContentError coverage.
• Updates examples/broadcasts.py to demonstrate clicked_links usage.

^{Written for commit 79f56c4. Summary will update on new commits.}

[klotty]

No issues found across 5 files

Confidence score: 5/5

• Automated review surfaced no issues in the provided summaries.
• No files require special attention.

<sub>Auto-approved: Adds sync and async methods to retrieve broadcast link click data, following existing pagination patterns and including comprehensive tests.

Re-trigger cubic</sub>

[klotty]

0 issues found across 1 file (changes from recent commits).

Confidence score: 5/5

• Automated review surfaced no issues in the provided summaries.
• No files require special attention.

<sub>Auto-approved: Adds sync/async Broadcasts.clicked_links() with typed responses, pagination support, tests, and an example; the visible diff shows a bounded, additive SDK wrapper following existing patterns with no remaining product or operational tradeoff.

Re-trigger cubic</sub>