update new feature template

[kaushik-himself]

Description

• What is this PR about?

Add a use case section to new feature requests

Screenshots/Results

• Add a screenshot of the changes or code responses

Reference Links

• Links to JIRA issue, links, Slack discussions, etc.

Checklist

This PR includes the following (tick all that apply):

• Tests added/updated for new/changed functionality
• Bug Fix (explain the bug in the description)
• Refactoring or optimizations (no functional changes)
• Documentation updated (README, docstrings, etc.)
• Build or deployment related changes
• Dependency updates (requirements.txt/pyproject.toml)
• Setup change (update README/setup instructions if required)
• Code style checks passed (PEP8, flake8, black, etc.)
• Type hints added/updated (if applicable)
• Pre-commit hooks run (if configured)