Update issue templates (#740)

Author: shivamerla

.github/ISSUE_TEMPLATE/bug_report.md

@@ -3,7 +3,7 @@ name: Bug report
 about: Create a report to help us improve
 title: Bug report template
 labels: ''
-assignees: slu2011, visheshtanksale, shivamerla
+assignees: shivamerla, visheshtanksale
 
 ---
 

.github/ISSUE_TEMPLATE/feature_request.md

@@ -0,0 +1,20 @@
+---
+name: Feature request
+about: Suggest an idea for this project
+title: ''
+labels: enhancement
+assignees: shivamerla, visheshtanksale
+
+---
+
+**Is your feature request related to a problem? Please describe.**
+A clear and concise description of what the problem is. Ex. I'm always frustrated when [...]
+
+**Describe the solution you'd like**
+A clear and concise description of what you want to happen.
+
+**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.

.github/ISSUE_TEMPLATE/question---general-discussion.md

@@ -0,0 +1,10 @@
+---
+name: Question / General Discussion
+about: Ask a question or raise a discussion
+title: "[Question]: "
+labels: question
+assignees: shivamerla, visheshtanksale
+
+---
+
+<!-- Ask question(s) or raise a discussion related to the NIM Operator -->