chore: add reviewpad configuration (#322)

reviewpad.yml

@@ -0,0 +1,36 @@
+rules:
+  - name: Open PR state
+    spec: '!$isDraft() && $getState() == "open"'
+
+  - name: First run state
+    spec: $getEventType() == "opened" && $rule("Open PR state")
+
+workflows:
+  - name: Assign author
+    run:
+      - if: $rule("First run state")
+        then: $addAssignees([$getAuthor()])
+
+  - name: Request review from maintainers
+    run:
+      - if: $rule("First run state")
+        then: $addReviewers($getTeamMembers("atomic-23/24"))
+
+  - name: Base message and summary
+    run:
+      - if: $rule("First run state")
+        then:
+          - if: $countUserPullRequests($getAuthor()) == 1
+            then: $info("Thanks for your first contribution!")
+            else: $info("Thanks for your contribution!")
+          - $warn("Please make sure the CI is green before merging.")
+          - $summarize()
+
+  - name: Enforce conventional commits
+    run:
+      - if: $rule("Open PR state")
+        then: $titleLint()
+
+  - name: Enforce head branch deletion
+    always-run: true
+    run: $deleteHeadBranch()