chore: Add mergify rules

Author: Snazzah

.mergify.yml

@@ -0,0 +1,25 @@
+pull_request_rules:
+  - name: Automatic merge on approval
+    conditions:
+      - approved-reviews-by=Snazzah
+    actions:
+      merge:
+        method: merge
+  - name: Merge non-breaking dependencies automatically
+    conditions:
+      - author~=^dependabot(|-preview)\[bot\]$
+      - title~=from (?P<major>\d+).\d+.\d+ to (?P=major).\d+.\d+
+    actions:
+      merge:
+        method: merge
+  - name: Notify breaking dependencies automatically
+    conditions:
+      - author~=^dependabot(|-preview)\[bot\]$
+      - title~=from (?P<major>\d+).\d+.\d+ to (?!(?P=major).\d+.\d+)
+    actions:
+      comment:
+        message: |
+          This PR features a major change and requires further approval.
+      request_reviews:
+        users:
+          - Snazzah