Create monthly-contributor-report.yml (#2095)

This workflow will create an issue each month, listing contributor info from the previous month.

.github/workflows/monthly-contributor-report.yml

@@ -0,0 +1,46 @@
+# Based on https://github.com/github/contributors/blob/main/README.md#example-workflow
+
+name: Monthly contributor report
+on:
+  workflow_dispatch:
+  schedule:
+    - cron: '0 1 1 * *'
+
+permissions:
+  issues: write
+
+jobs:
+  contributor_report:
+    name: contributor report
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Get dates for last month
+        shell: bash
+        run: |
+          # Calculate the first day of the previous month
+          start_date=$(date -d "last month" +%Y-%m-01)
+  
+          # Calculate the last day of the previous month
+          end_date=$(date -d "$start_date +1 month -1 day" +%Y-%m-%d)
+
+          #Set an environment variable with the date range
+          echo "START_DATE=$start_date" >> "$GITHUB_ENV"
+          echo "END_DATE=$end_date" >> "$GITHUB_ENV"
+
+      - name: Run contributor action
+        uses: github/contributors@v1
+        env:
+          GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+          START_DATE: ${{ env.START_DATE }}
+          END_DATE: ${{ env.END_DATE }}
+          REPOSITORY: WordPress/Learn
+
+      - name: Create issue
+        uses: peter-evans/create-issue-from-file@v4
+        with:
+          title: Monthly contributor report
+          token: ${{ secrets.GITHUB_TOKEN }}
+          content-filepath: ./contributors.md
+          assignees: bsanevans
+