Update issue templates

Author: icaoberg

.github/ISSUE_TEMPLATE/feature-request.md

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+---
+name: Feature request
+about: Describe this issue template's purpose here.
+title: New metric request
+labels: enhancement, help wanted
+assignees: ''
+
+---
+
+## Metric request
+
+**Proposed Statistic/Metric**: [Describe the new statistic you want to add to the dataset]
+
+**Justification**: [Explain why this new statistic would be valuable for the dataset and its users]
+
+## Implementation Details
+
+**Data Source**: The information needed to compute the statistic should come from this file `https://download.brainimagelibrary.org/inventory/daily/reports/today.json` or any file(s) listed in `today.json`.
+
+**Calculation Method**: [Outline the calculation or algorithm to derive the new statistic]
+
+**Expected Output**: [Describe the expected format or structure of the new statistic or an example output]
+
+## Additional Information
+
+**Stakeholders**: [List the stakeholders who would benefit from being aware of this statistic]
+
+**Viz**: [List the potential visualizations that could be used with this statistic. Check this [link](https://grafana.com/docs/grafana/latest/panels-visualizations/visualizations/) for additional information]
+
+**Impact**: [Discuss the potential impact of adding this statistic, such as its usefulness for analysis, research, or decision-making]
+
+**Contributor**: [Mention if you are interested in working on this feature yourself or if you are seeking collaboration from others]
+
+## Checklist
+
+- [ ] I have reviewed the existing documentation to ensure the proposed statistic aligns with the scope and purpose.
+- [ ] I have provided sufficient details about the proposed statistic, including its calculation method and expected output.
+- [ ] I have referenced relevant documentation or resources that support the addition of the new statistic.
+- [ ] I have considered the potential impact and benefits of adding this statistic to the dataset.
+- [ ] I am willing to collaborate and work on implementing this new statistic, or I am seeking collaboration from others.