Add issue manager workflow

.github/workflows/issue-manager.yml

@@ -0,0 +1,59 @@
+# Automatically close issues that have a keyword mark (an HTML comment)
+# in the last comment in the issue, by a group of predefined users, after a custom delay.
+# https://github.com/tiangolo/issue-manager
+
+# Default config:
+# <!-- issue-manager: answered -->
+# Wait 10 days and comment: "Assuming the original issue was solved, it will be automatically closed now"
+
+# Extra config:
+# '<!-- issue-manager: waiting -->'
+# Wait 10 days and comment: "Automatically closing. To re-open, please provide the additional information requested"
+
+name: Issue Manager
+
+on:
+  schedule:
+  - cron: "0 0 * * *"
+
+jobs:
+  issue-manager:
+    runs-on: ubuntu-latest
+    steps:
+    - uses: tiangolo/issue-manager@0.3.0
+      with:
+        token: ${{ secrets.GITHUB_TOKEN }}
+
+        config: >
+          {
+            "answered": {
+              "delay": 864000,
+              "message": "Assuming the original issue was solved, it will be automatically closed now.",
+              "users": [
+               "pydanny",
+               "audreyr",
+               "luzfcb",
+               "theskumar",
+               "jayfk",
+               "burhan",
+               "webyneter",
+               "browniebroke",
+               "sfdye",
+              ]
+            },
+            "waiting": {
+              "delay": 864000,
+              "message": "Automatically closing. To re-open, please provide the additional information requested.",
+              "users": [
+                "pydanny",
+                "audreyr",
+                "luzfcb",
+                "theskumar",
+                "jayfk",
+                "burhan",
+                "webyneter",
+                "browniebroke",
+                "sfdye",
+              ]
+            }
+          }