Add PR template (#8)

.github/pull_request_template.md

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+## Description
+
+<!--- Describe your changes -->
+
+## Motivation and Context
+
+<!--- Why is this change required? What problem does it solve? -->
+<!--- If it fixes an open issue, please link to the issue here. -->
+
+## How Has This Been Tested?
+
+<!--- Please describe in detail how you tested your changes. -->
+<!--- Include details of your testing environment, and the tests you ran to -->
+<!--- see how your change affects other areas of the code, etc. -->
+
+## Checklist
+
+<!--- Go over all the following points, and put an `x` in all the boxes that apply. -->
+<!--- If you're unsure about any of these, don't hesitate to ask. We're here to help! -->
+
+- [ ] I have updated the documentation accordingly.
+- [ ] All new and existing tests passed.

.github/release.yml

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+changelog:
+  exclude:
+    labels:
+      - ignore for notes
+  categories:
+    - title: Incompatible Changes
+      labels:
+        - incompatible changes
+    - title: Features
+      labels:
+        - feature
+    - title: Bugfixes
+      labels:
+        - bug
+    - title: Other Changes
+      labels:
+        - "*"
+      exclude:
+        labels:
+          - dependencies
+    - title: Dependency Updates
+      labels:
+        - dependencies