Create milestone_dev.md

.github/ISSUE_TEMPLATE/milestone_dev.md

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+---
+name: Development Task
+title: ''
+labels: ''
+assignees: ''
+
+---
+
+## **Task Title**  
+_Short and descriptive title of the task._  
+
+---
+
+### **Description**  
+_Provide a detailed description of the task. Include the objective, context, and expected outcomes._  
+
+---
+
+### **Milestone**  
+_Linked milestone:_  
+- [ ] **Milestone Name**: [Insert milestone name here, e.g., "Release v2.1.7"](https://github.com/pinellolab/CRISPRme/milestones)  
+
+---
+
+### **Acceptance Criteria**  
+_Describe the conditions that must be met for the task to be considered complete._  
+- [ ] [Criterion 1]  
+- [ ] [Criterion 2]  
+- [ ] [Criterion 3]  
+
+---
+
+### **Steps to Completion**  
+_List the detailed steps or sub-tasks required to complete the issue._  
+1. [Step 1: Define requirements or initial setup]  
+2. [Step 2: Implement logic or feature]  
+3. [Step 3: Test and validate results]  
+4. [Step 4: Update documentation if necessary]  
+
+---
+
+### **Labels**  
+_Apply relevant labels:_  
+- `enhancement`  
+- `bug`  
+- `testing`  
+- `documentation`  
+
+---
+
+### **Assignees**  
+_Assign team members responsible for this issue._  
+- **Primary:** [Team Member Name/Handle]  
+- **Support:** [Team Member Name/Handle]  
+
+---
+
+### **Additional Notes**  
+_Include any additional context, references, or dependencies related to the task._  
+- Example: _Related to issue #123 or PR #456._  
+- Dependencies: _Blocked by [issue/PR link]._  
+