Added GitHub Actions to create and check for reminders in pull requests.
diff --git a/.github/workflows/reminders_check.yml b/.github/workflows/reminders_check.yml
new file mode 100644
index 0000000000000..eaaa909363202
--- /dev/null
+++ b/.github/workflows/reminders_check.yml
@@ -0,0 +1,17 @@
+name: Check reminders
+
+on:
+  schedule:
+    - cron: '0 * * * *'  # At the start of every hour
+  workflow_dispatch:
+
+permissions:
+  contents: read
+  pull-requests: write
+
+jobs:
+  reminders:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Check reminders and notify users
+        uses: agrc/reminder-action@v1
diff --git a/.github/workflows/reminders_create.yml b/.github/workflows/reminders_create.yml
new file mode 100644
index 0000000000000..f92320bcc2e75
--- /dev/null
+++ b/.github/workflows/reminders_create.yml
@@ -0,0 +1,17 @@
+name: Create reminders
+
+on:
+  issue_comment:
+    types: [created, edited]
+  workflow_dispatch:
+
+permissions:
+  contents: read
+  pull-requests: write
+
+jobs:
+  reminders:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Check comments and create reminders
+        uses: agrc/create-reminder-action@v1

This branch provides functionality to create reminders on pull requests. The command to do so is:

```
/remind me <action> [in] <time>
```

Current granularity of the reminders is by day, so valid uses would be:

```
/remind me to re-review this PR in 2 days
/remind me to check for updates tomorrow
/remind me to evaluate reminders in 2 months
```

Example of adding a reminder and the following reminder posted by the action is:
![image](https://github.com/django/django/assets/124304/0bcc172f-22b5-4828-a7ba-cade2b9eac89)
![image](https://github.com/django/django/assets/124304/ef48ead4-a84d-4b8b-a644-571dfcf6ef06)
