New Metric Template: Update time-to-first-response.md

[yigakpoa]

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Data Collection Strategies

• Timestamps: Collect timestamps for when activities (e.g., issues, pull requests, or emails) are created and when the first response is made.
• Activity Tracking: Use version control systems (GitHub, GitLab), mailing lists, or forums to capture activity and response times.
• Exclusion of Automated Responses: Make sure to exclude responses from bots or other automated systems when measuring genuine community engagement.