TASK: Create an `Epic` issue template

[widal001]

Summary

Create a new issue template epic.md for deliverables

To Do

• Create ISSUE_TEMPLATE/epic.md with the following sections
  • User Story
  • Goals
  • Non-goals
  • Related Tasks
• Add the following metadata to the front-matter:
  • Name: EPIC:
  • Description: Describe a high-level initiative or milestone that encompasses multiple tasks.
  • Labels: epic

Definition of Done

• Users and contributors are presented with an issue option called "Epic" when creating a new issue