Add "issue_moderator" github workflow (#629)

.github/workflows/issue_moderator.yml

@@ -0,0 +1,48 @@
+name: Issue moderator
+
+on:
+  issues:
+    types: [opened, edited, reopened]
+  issue_comment:
+    types: [created]
+
+jobs:
+  autoclose:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Moderate issues
+        uses: tachiyomiorg/issue-moderator-action@v1
+        with:
+          repo-token: ${{ github.token }}
+          duplicate-check-enabled: true
+          duplicate-check-label: Source request
+          existing-check-enabled: true
+          existing-check-label: Source request
+          auto-close-rules: |
+            [
+              {
+                "type": "title",
+                "regex": ".*<short description>.*",
+                "message": "You did not fill out the description in the title"
+              },
+              {
+                "type": "title",
+                "regex": ".*(<|>)+.*",
+                "message": "You did not remove Angle brackets(< and >) from the title"
+              },
+              {
+                "type": "body",
+                "regex": ".*DELETE THIS SECTION IF YOU HAVE READ AND ACKNOWLEDGED IT.*",
+                "message": "The acknowledgment section was not removed"
+              },
+              {
+                "type": "body",
+                "regex": ".*(Suwayomi-Server version|Server Operating System|Server Desktop Environment|Server JVM version|Client Operating System|Client Web Browser):.*(\\(Example:|<usually).*",
+                "message": "The requested information was not filled out"
+              },
+              {
+                "type": "body",
+                "regex": ".*Remove this line after you are done.*",
+                "message": "The lines requesting to be removed were not removed."
+              }
+            ]