Add Github workflows

.github/dependabot.yml

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+version: 2
+updates:
+
+  - package-ecosystem: "github-actions"
+    directory: "/"
+    schedule:
+      interval: "weekly"

.github/workflows/ci.yml

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+name: Continuous Integration
+on:
+  push:
+    branches: [main]
+  pull_request:
+    paths:
+      - "src/**"
+      - "project/**"
+      - ".scalafmt.conf"
+      - ".github/**"
+      - "build.sbt"
+
+concurrency:
+  group: ${{ github.ref }}
+  cancel-in-progress: ${{ github.ref != 'refs/heads/main' }}
+
+jobs:
+  scalafmt:
+    name: Check Formatting
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - uses: coursier/[email protected]
+        with:
+          apps: scalafmt
+      - run: scalafmt --test
+  test:
+    strategy:
+      fail-fast: false
+      matrix:
+        include:
+          - os: ubuntu-latest
+            jvm: 'adoptium:1.8.0-372'
+          - os: windows-latest
+            jvm: 'adoptium:1.11.0.19'
+          - os: macOS-latest
+            jvm: 'adoptium:1.17.0.7'
+          - os: ubuntu-latest
+            jvm: 'adoptium:1.20.0.1'
+    name: Unit Tests on ${{ matrix.os }} -- ${{ matrix.jvm }}
+    runs-on: ${{ matrix.os }}
+    steps:
+    - uses: actions/checkout@v4
+    - uses: coursier/[email protected]
+      with:
+        jvm: ${{ matrix.jvm }}
+        apps: sbt
+    - name: Unit tests
+      run: sbt test
+      shell: bash

.github/workflows/dependency-graph.yml

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+name: sbt Dependency Graph
+on:
+  push:
+    branches:
+      - main
+jobs:
+  update-graph:
+    name: Update Dependency Graph
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - uses: scalacenter/sbt-dependency-submission@v3
+        with:
+          configs-ignore: scala-doc-tool

.github/workflows/release.yml

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+name: Release
+on:
+  push:
+    tags: ["*"]
+jobs:
+  publish:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - uses: coursier/[email protected]
+        with:
+          apps: sbt
+          jvm: 'adopt:1.8'
+      - run: sbt ci-release
+        env:
+          PGP_PASSPHRASE: ${{ secrets.PGP_PASSPHRASE }}
+          PGP_SECRET: ${{ secrets.PGP_SECRET }}
+          SONATYPE_PASSWORD: ${{ secrets.SONATYPE_PASSWORD }}
+          SONATYPE_USERNAME: ${{ secrets.SONATYPE_USERNAME }}