Add PR/Issue/Feature templates

Signed-off-by: Humble Chirammal <hchiramm@redhat.com>

.github/ISSUE_TEMPLATE/bug_report.md

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+---
+name: Bug report
+about: Create a report to help us improve
+
+---
+
+# Describe the bug #
+
+A clear and concise description of what the bug is.
+
+# Environment details #
+
+- Image/version of Ceph CSI driver
+- helm chart version
+- Kubernetes cluster version
+- Logs
+
+# Steps to reproduce #
+
+Steps to reproduce the behavior:
+
+1. Setup details: '...'
+1. Deployment to trigger the issue '....'
+1. See error
+
+# Actual results #
+
+Describe what happened
+
+# Expected behavior #
+
+A clear and concise description of what you expected to happen.
+
+# Additional context #
+
+Add any other context about the problem here.
+
+For example:
+
+Any existing bug report which describe about the similar issue/behavior

.github/ISSUE_TEMPLATE/feature_request.md

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+---
+name: Feature request
+about: Suggest an idea for this project
+
+---
+
+# Describe the feature you'd like to have #
+
+What new functionality do you want?
+
+# What is the value to the end user? (why is it a priority?) #
+
+How would the end user gain value from having this feature?
+
+# How will we know we have a good solution? (acceptance criteria) #
+
+Add a list of criteria that should be met for this feature to be useful
+
+# Additional context #
+
+Add any other context or screenshots about the feature request here.