ci: add github workflows

.github/dependabot.yml

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+version: 2
+updates:
+  - package-ecosystem: github-actions
+    directory: '/'
+    schedule:
+      interval: daily
+  - package-ecosystem: "npm"
+    directory: "/"
+    schedule:
+      interval: "weekly"
+      day: "monday"
+      time: "11:00"
+      # EST timezone
+      timezone: "America/New_York"
+    rebase-strategy: "auto"
+    # Disable versioned updates, and only allow security updates
+    open-pull-requests-limit: 0
+    commit-message:
+      # Prefix all commit messages with "chore"
+      # include a list of updated dependencies
+      prefix: "chore:"
+      include: "scope"
+    labels:
+      - "dependencies"

.github/workflows/pr.yml

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+name: pr
+
+on:
+  push:
+    branches:
+      - main
+  pull_request:
+    branches:
+      - main
+
+jobs:
+  lint:
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout files
+        uses: actions/checkout@v4
+
+      - name: Install Node v18
+        uses: actions/setup-node@v4
+        with:
+          node-version: '18.14'
+
+      - name: Install JS dependencies
+        run: yarn install
+
+      - name: Linter
+        run: yarn lint
+
+  build:
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout files
+        uses: actions/checkout@v4
+
+      - name: Install Node v18
+        uses: actions/setup-node@v4
+        with:
+          node-version: '18.14'
+
+      - name: Install JS dependencies
+        run: yarn install
+
+      - name: Build
+        run: yarn build

.github/workflows/semantic.yml

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+name: pr-title
+
+on:
+  pull_request:
+    branches:
+      - main
+    types:
+      - opened
+      - edited
+      - synchronize
+  pull_request_target:
+    types:
+      - opened
+      - edited
+      - synchronize
+
+jobs:
+  validate-title:
+    permissions:
+      pull-requests: read  # for amannn/action-semantic-pull-request to analyze PRs
+    name: Validate PR Title
+    runs-on: ubuntu-latest
+    steps:
+      - name: semantic-pull-request
+        uses: amannn/action-semantic-pull-request@v5
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}