Add new Issue Templates

.github/ISSUE_TEMPLATE/task.md

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+---
+name: Task
+about: Individual to-do
+title: ''
+labels: ''
+assignees: ''
+
+---
+
+### What needs to be done
+
+Describe what needs to be done here.
+
+Ex: "Relay synchronization starts from the most recently stored block header"
+
+### Why it needs to be done
+
+Describe why it needs to be done here.
+
+Ex: "Reduces the amount of time for the relay to synchronize to the latest block"
+
+### Tests
+
+Link associated tests here
+
+### Stories
+
+Link associated stories here
+
+### Acceptance Criteria
+
+Describe how we can know whether the task is done.
+
+Ex:
+- When restarting the relay, synchronization picks up from the most recently stored block
+
+### Additional Information
+
+Describe anything relevant that hasn't been mentioned yet.

.github/ISSUE_TEMPLATE/user-story.md

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+---
+name: User Story
+about: Describe a user story
+title: ''
+labels: ''
+assignees: ''
+
+---
+
+## Overview
+
+A clear and concise description of the user and their need
+
+## Story
+
+As a [persona], I want [goal] so that [reason]
+
+## Test Scenarios
+Link given/when/then test scenarios here
+
+## Acceptance Criteria
+
+- Functional acceptance criteria to be met
+- Non-functional acceptance criteria to be met