Add github issue templates, dependabot config and PR template

[dhirajsb]

Description

Added files for github issue templates, dependabot config and github PR template

How Has This Been Tested?

Merge criteria:

• [X] The commits and have meaningful messages; the author will squash them after approval or will ask to merge with squash.
• [ ] Testing instructions have been added in the PR body (for PRs involving changes that are not immediately obvious).
• [X] The developer has manually tested the changes and verified that the changes work