✨ Maintenance: New DeFFcode project issue and PR templates (Fixes #2)

[abhiTronix]

Brief Description

This PR will implement of new Issue and PR Templates for contributing to DeFFcode with the latest format available.

Changes

• ✨ Added PR template:
  • 🚸 Added a pull request template(PULL_REQUEST_TEMPLATE.md) for project contributors to automatically see the template's contents in the pull request body.
  • 📝 Added Brief Description, Requirements / Checklist, Related Issue, Context, Types of changes blocks.
  • 💡 Added useful comments for convenience.
• ✨ Added Proposal, Bug-Report and Question templates:
  • ✨ Created an ISSUE_TEMPLATE subdirectory to contain multiple issue templates.
  • 🚸 Add manually-created Proposal(proposal.md) and Question(question.md) issue template for project contributors to automatically see the template's contents in the issue body.
  • 📝 Added Brief Description, Acknowledgment, Context, Current Environment, Any Other Information like blocks.
  • 🚸 Add an manually-created Bug Report(bug_report.md) issue template to ISSUE_TEMPLATE subdirectory for project contributors to automatically see the template's contents in the issue body.
  • 📝 Added Brief Description, Acknowledgment, Context, Current Environment, Expected Behavior, Actual Behavior, Possible Fix, Steps to reproduce, Miscellaneous like blocks.
  • ✨ Added YAML frontmatter to each issue template to pre-fill the issue title, automatically add labels and assignees, and give the template a name and description.
  • 💡 Added useful comments for convenience.
  • ✨ Added a config.yml file to the .github/ISSUE_TEMPLATE folder to customize the issue template chooser that people see when creating a new issue.
  • ♿️ Set blank_issues_enabled parameter to false to encourage contributors to use issue templates.
  • 🚸 Added contact_links parameter with gitter community link to receive regular issues outside of GitHub.

📝 Docs:

• 📝 Updated Roadmap.
• 🐛 Fixed Gitter Community Link in Mkdocs.

Related Issue

2

Context

This PR will implement new customized Issue and PR templates that are available for contributors to use when they open new issues in your repository.

Types of changes

• [ ] Bug fix (non-breaking change which fixes an issue)
• [x] New feature (non-breaking change which adds functionality)
• [ ] Breaking change (fix or feature that would cause existing functionality to change)