[Releases] Add a GitHub release config (#7)

[Releases] Add a GitHub release config

### Motivation

This config helps compose release notes easier.

### Modifications

Added a config file that instructs GitHub how to group PRs.

### Result

Releases can be mostly generated now.

### Test Plan

N/A


Reviewed by: simonjbeaumont

Builds:
     ✔︎ pull request validation (5.8) - Build finished. 
     ✔︎ pull request validation (5.9) - Build finished. 
     ✔︎ pull request validation (nightly) - Build finished. 
     ✔︎ pull request validation (soundness) - Build finished. 

#7

Author: czechboy0

.github/release.yml

@@ -0,0 +1,15 @@
+changelog:
+  categories:
+    - title: SemVer Major
+      labels:
+        - semver/major
+    - title: SemVer Minor
+      labels:
+        - semver/minor
+    - title: SemVer Patch
+      labels:
+        - semver/patch
+    - title: Other Changes
+      labels:
+        - semver/none
+        - "*"