Add scheduled GitHub Action workflow for weekly Copilot tasks

.github/workflows/README.md

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+# GitHub Actions Workflows
+
+This directory contains automated workflows for the Uplink repository.
+
+## Weekly Copilot Task
+
+**File:** `weekly-copilot-task.yml`
+
+**Schedule:** Every Wednesday at 9:00 AM UTC
+
+**Purpose:** This workflow demonstrates how to set up a scheduled GitHub Action that runs weekly. It can be customized to integrate with GitHub Copilot or other automation tools.
+
+**Trigger Methods:**
+- **Automatic:** Runs every Wednesday at 9:00 AM UTC via cron schedule
+- **Manual:** Can be triggered manually from the Actions tab using the "workflow_dispatch" feature
+
+**Customization Ideas:**
+- Create automated code review issues
+- Generate weekly reports
+- Run automated maintenance tasks
+- Trigger Copilot-based code analysis
+- Check for dependency updates
+- Generate documentation
+
+To manually trigger the workflow:
+1. Go to the "Actions" tab in the GitHub repository
+2. Select "Weekly Copilot Task" from the workflows list
+3. Click "Run workflow"

.github/workflows/weekly-copilot-task.yml

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+name: Weekly Copilot Task
+
+on:
+  schedule:
+    # Runs every Wednesday at 9:00 AM UTC (cron format: minute hour day-of-month month day-of-week)
+    # Day of week: 0 = Sunday, 1 = Monday, 2 = Tuesday, 3 = Wednesday, etc.
+    - cron: '0 9 * * 3'
+  workflow_dispatch: # Allows manual trigger for testing
+
+jobs:
+  copilot-task:
+    runs-on: ubuntu-latest
+    permissions:
+      contents: read
+      issues: write
+      pull-requests: write
+
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v4
+
+      - name: Ask Copilot to review code
+        run: |
+          echo "🤖 GitHub Copilot Weekly Task"
+          echo "=============================="
+          echo "This workflow runs every Wednesday at 9:00 AM UTC"
+          echo ""
+          echo "Current date: $(date)"
+          echo "Repository: ${{ github.repository }}"
+          echo ""
+          echo "✅ Copilot task executed successfully!"
+          echo ""
+          echo "Note: This is a template workflow. You can customize it to:"
+          echo "  - Create issues for code review"
+          echo "  - Generate reports"
+          echo "  - Run automated checks"
+          echo "  - Trigger Copilot-based analysis"