feat: update issue templates

Author: akdasa

.github/ISSUE_TEMPLATE/task.md

@@ -0,0 +1,19 @@
+---
+name: Task
+about: Feature Implementation Task
+title: ''
+labels: ''
+assignees: ''
+
+---
+
+_Add brief description of a task_
+
+## Implementation Details
+1. Step one
+2. Step two
+
+## Acceptance Criteria
+- [ ] Criterion 1  
+- [ ] Criterion 2  
+- [ ] Criterion 3