feat: add broadcasts clicked-links command

[dielduarte]

Adds broadcasts 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

---

Summary by cubic

Adds broadcasts clicked-links to list a broadcast’s clicked links with pagination and ranking by total clicks. Previously the CLI had no way to view clicked links for a broadcast.

• Supports [id] and flags --limit <n> (1–100, default 10), --after <cursor>, and --before <cursor>.
• Interactive mode renders a table (URL, Clicks, Unique Clicks) and prints pagination hints; non-interactive outputs the JSON list.
• Help text documents auth_error, invalid_limit, invalid_pagination, and list_error.
• Bumps resend to 6.22.0 to use the broadcasts.clickedLinks API.
• Updates documentation (command reference and skills/resend-cli command table) and adds tests for pagination, limit validation, missing API key, and SDK list errors.

^{Written for commit b6f38f0. Summary will update on new commits.}

[cubic-dev-ai]

All reported issues were addressed across 7 files

<sub>Reply with feedback, questions, or to request a fix.

Fix all with cubic | Re-trigger cubic</sub>

[klotty]

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

<sub>Auto-approved: Adds the broadcasts clicked-links command to list clicked links for a broadcast, supporting pagination and both table and JSON output formats.

Re-trigger cubic</sub>

[klotty]

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

<sub>Auto-approved: Adds the broadcasts clicked-links command to list clicked links for a broadcast, supporting pagination and both table and JSON output formats.

Re-trigger cubic</sub>