feat(extensions): add verify-tasks extension to community catalog (#1871)

* feat(extensions): add verify-tasks extension to community catalog

- Extension ID: verify-tasks
- Version: 1.0.0
- Detects phantom completions: tasks marked [X] in tasks.md with no real implementation

Co-Authored-By: Claude Sonnet 4.6 <[email protected]>

* Replace email with name in verify-tasks catalog entry

Co-Authored-By: Claude Sonnet 4.6 <[email protected]>

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Co-authored-by: Claude Sonnet 4.6 <[email protected]>