Add more checks to the issue template

[NicholasChoong]

Is your feature request related to a problem? Please describe.
Devs are not resolving pr issues before requesting for reviews

Describe the solution you'd like
Add a few checkpoints so that the PR author needs to tick before requesting for a review.

• Have you resolved all current merge conflicts
• Have you type checked and built the project
• Have you run autoformatting and linting

Describe alternatives you've considered
A clear and concise description of any alternative solutions or features you've considered.

Additional context
Add any other context or screenshots about the feature request here.