add github metadata

Author: prplecake

.github/CODEOWNERS

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+* @prplecake

.github/dependabot.yml

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+# To get started with Dependabot version updates, you'll need to specify which
+# package ecosystems to update and where the package manifests are located.
+# Please see the documentation for all configuration options:
+# https://docs.github.com/code-security/dependabot/dependabot-version-updates/configuration-options-for-the-dependabot.yml-file
+
+version: 2
+updates:
+  - package-ecosystem: "github-actions" # See documentation for possible values
+    directory: "/" # Location of package manifests
+    schedule:
+      interval: "monthly"

.github/workflows/deploy.yml

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+name: Deploy
+
+on:
+  push:
+    branches: ["master"]
+  workflow_dispatch:
+
+permissions:
+  contents: read
+  pages: write
+  id-token: write
+
+# Allow only one concurrent deployment, skipping runs queued between the run in-progress and latest queued.
+# However, do NOT cancel in-progress runs as we want to allow these production deployments to complete.
+concurrency:
+  group: "pages"
+  cancel-in-progress: false
+
+jobs:
+  deploy:
+    environment:
+      name: github-pages
+      url: ${{ steps.deployment.outputs.page_url }}
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+        with:
+          submodules: recursive
+      - name: Install pandoc
+        run: sudo apt install -y pandoc
+      - name: Setup Pages
+        uses: actions/configure-pages@v5
+      - name: Build site
+        run: make build
+      - name: Upload artifact
+        uses: actions/upload-pages-artifact@v3
+      - name: Deploy to GitHub Pages
+        id: deployment
+        uses: actions/deploy-pages@v4

.github/workflows/update-submodules.yml

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+name: Update submodule robots.txt
+
+on:
+  workflow_dispatch:
+
+permissions:
+  contents: write
+
+concurrency:
+  group: 'update-submodules'
+  cancel-in-progress: true
+
+jobs:
+  update-submodule-robots-txt:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+        with:
+          submodules: recursive
+      - name: Update submodules
+        run: git submodule update --remote submodules/robots.txt
+      - name: Commit changes
+        if: ${{ github.event_name != 'pull_request' }}
+        uses: devops-infra/action-commit-push@master
+        with:
+          github_token: "${{ secrets.GITHUB_TOKEN }}"
+          commit_prefix: "[Workflow Commit] "
+          commit_message: "Updated submodules"