Add GitHub workflows for generating metrics and contribution snake

.github/workflows/metrics.yml

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+name: Generate GitHub Metrics
+
+on:
+  schedule:
+    - cron: "0 0 * * 0"   # Runs every Sunday
+  workflow_dispatch:       # Allow manual runs
+
+jobs:
+  github-metrics:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: lowlighter/metrics@latest
+        with:
+          token: ${{ secrets.METRICS_TOKEN }}
+          user: Alvin-Zilverstand
+          template: classic
+          base: header, activity, community, repositories, metadata
+          config_timezone: Europe/Amsterdam
+
+          # 📅 Isometric commit calendar
+          plugin_isocalendar: yes
+          plugin_isocalendar_duration: full-year

.github/workflows/snake.yml

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+name: Generate Contribution Snake
+
+on:
+  schedule:
+    - cron: "0 0 * * *"   # Runs every day at midnight
+  workflow_dispatch:       # Allow manual runs
+  push:
+    branches:
+      - main
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: Platane/snk@v3
+        with:
+          github_user_name: Alvin-Zilverstand
+          outputs: dist/snake.svg
+      - name: Push Snake to output branch
+        uses: EndBug/add-and-commit@v9
+        with:
+          branch: output
+          message: "chore: update snake animation"
+          add: "dist/snake.svg"