chore(ci): add Continuous Integration workflow

.github/workflows/ci.yml/ci.yml

@@ -0,0 +1,72 @@
+name: Continuous Integration
+
+on:
+  push:
+    branches:
+      - main
+  pull_request:
+    branches:
+      - main
+  schedule:
+    - cron: "0 0 * * 0"
+
+jobs:
+  build:
+    name: Build for ${{ matrix.TARGET }} using Rust ${{ matrix.TOOLCHAIN }} (on ${{ matrix.OS }})
+    runs-on: ${{ matrix.OS }}
+    strategy:
+      fail-fast: false
+      matrix:
+        OS: [ubuntu-latest]
+        TOOLCHAIN: [stable, nightly]
+        TARGET:
+          - x86_64-unknown-linux-gnu
+          - x86_64-unknown-linux-musl
+          - i686-unknown-linux-gnu
+          - i686-unknown-linux-musl
+          - armv5te-unknown-linux-gnueabi
+          - armv7-unknown-linux-gnueabihf
+          - aarch64-unknown-linux-gnu
+          - aarch64-unknown-linux-musl
+
+    steps:
+      - name: Checkout the repository
+        uses: actions/checkout@v2
+
+      - name: Install Rust
+        uses: actions-rs/toolchain@v1
+        with:
+          toolchain: ${{ matrix.TOOLCHAIN }}
+          target: ${{ matrix.TARGET }}
+          override: true
+          components: rustfmt, clippy
+
+      - name: Build
+        uses: actions-rs/cargo@v1
+        with:
+          use-cross: true
+          command: build
+          args: --target ${{ matrix.TARGET }}
+
+      - name: Check formatting
+        uses: actions-rs/cargo@v1
+        with:
+          command: fmt
+          args: --all -- --check
+
+      - name: Check lints
+        uses: actions-rs/cargo@v1
+        with:
+          command: clippy
+          args: -- -D warnings
+
+  audit:
+    name: Perform audit for security
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout the repository
+        uses: actions/checkout@v2
+      - name: Run cargo-audit
+        uses: actions-rs/audit-check@v1
+        with:
+          token: ${{ secrets.GITHUB_TOKEN }}