add workflows from psqs

.github/dependabot.yml

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+version: 2
+updates:
+  - package-ecosystem: github-actions
+    directory: /
+    schedule:
+      interval: daily
+  - package-ecosystem: cargo
+    directory: /
+    schedule:
+      interval: daily

.github/workflows/check.yml

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+# from https://github.com/jonhoo/rust-ci-conf
+permissions:
+  contents: read
+on:
+  push:
+    branches: [master]
+  pull_request:
+name: check
+jobs:
+  fmt:
+    runs-on: ubuntu-latest
+    name: nightly / fmt
+    steps:
+      - uses: actions/checkout@v4
+        with:
+          submodules: true
+      - name: Install stable
+        uses: dtolnay/rust-toolchain@nightly
+        with:
+          components: rustfmt
+      - name: cargo fmt --check --all
+        run: cargo fmt --check --all
+  clippy:
+    runs-on: ubuntu-latest
+    name: ${{ matrix.toolchain }} / clippy
+    permissions:
+      contents: read
+      checks: write
+    strategy:
+      fail-fast: false
+      matrix:
+        toolchain: [nightly]
+    steps:
+      - uses: actions/checkout@v4
+        with:
+          submodules: true
+      - name: Install ${{ matrix.toolchain }}
+        uses: dtolnay/rust-toolchain@master
+        with:
+          toolchain: ${{ matrix.toolchain }}
+          components: clippy
+      - name: cargo clippy
+        uses: actions-rs/clippy-check@v1
+        with:
+          token: ${{ secrets.GITHUB_TOKEN }}
+          args: --workspace --all-targets -- -D warnings
+  doc:
+    runs-on: ubuntu-latest
+    name: nightly / doc
+    steps:
+      - uses: actions/checkout@v4
+        with:
+          submodules: true
+      - name: Install nightly
+        uses: dtolnay/rust-toolchain@nightly
+      - name: cargo doc
+        run: cargo doc --no-deps --all-features
+        env:
+          RUSTDOCFLAGS: --cfg docsrs

.github/workflows/test.yml

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+permissions:
+  contents: read
+on:
+  push:
+    branches: [master]
+  pull_request:
+name: test
+jobs:
+  required:
+    runs-on: ubuntu-latest
+    name: ubuntu / ${{ matrix.toolchain }}
+    strategy:
+      matrix:
+        toolchain: [nightly]
+    steps:
+      - uses: actions/checkout@v4
+        with:
+          submodules: true
+      - name: Install ${{ matrix.toolchain }}
+        uses: dtolnay/rust-toolchain@master
+        with:
+          toolchain: ${{ matrix.toolchain }}
+      - name: cargo generate-lockfile
+        if: hashFiles('Cargo.lock') == ''
+        run: cargo generate-lockfile
+      # https://twitter.com/jonhoo/status/1571290371124260865
+      - name: cargo test --locked
+        run: cargo test --locked --all-features --lib --bins --tests --examples -- --test-threads=1
+      - name: cargo bench
+        run: cargo bench