Add CI workflow to build on PRs, pushes, and manual commits

This should've been here in the first place to make sure contributor's code actually builds.

.github/workflows/build.yml

@@ -0,0 +1,80 @@
+name: Build
+
+on:
+  push:
+  pull_request:
+  workflow_dispatch:
+
+jobs:
+  build:
+    runs-on: ${{ matrix.os }}
+    strategy:
+      matrix:
+        os: [ubuntu-latest, macos-latest, windows-latest]
+    env:
+      GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+    steps:
+      - uses: actions/checkout@v3
+      - uses: extractions/setup-just@v1
+
+      - name: Install Rust for macOS Intel
+        if: matrix.os == 'macos-latest'
+        uses: actions-rs/toolchain@v1
+        with:
+          toolchain: stable
+          target: aarch64-apple-darwin
+      - name: Install Rust for macOS
+        if: matrix.os == 'macos-latest'
+        uses: actions-rs/toolchain@v1
+        with:
+          toolchain: stable
+          target: aarch64-apple-darwin
+      - name: Install Rust for Windows
+        if: matrix.os == 'windows-latest'
+        uses: actions-rs/toolchain@v1
+        with:
+          toolchain: stable
+      - name: Install Rust for Linux
+        if: matrix.os == 'ubuntu-latest'
+        uses: actions-rs/toolchain@v1
+        with:
+          toolchain: stable
+          target: x86_64-unknown-linux-gnu
+
+      - name: Install Linux dependencies
+        if: matrix.os == 'ubuntu-latest'
+        run: |
+          sudo apt-get update
+          sudo apt-get install librust-gdk-dev gcc-mingw-w64-x86-64
+
+      - name: Lint code
+        run: just lint
+
+      - name: Run tests
+        uses: actions-rs/cargo@v1
+        with:
+          command: test
+
+      - name: Build macOS
+        if: matrix.os == 'macos-latest'
+        run: |
+          just build-mac-intel
+          just build-mac-arm
+      - name: Build Windows MSVC
+        if: matrix.os == 'windows-latest'
+        run: just build-win
+      - name: Build Linux
+        if: matrix.os == 'ubuntu-latest'
+        run: |
+          just build-linux
+          just build-windows-glibc
+      - name: Build Linux NoGUI
+        if: matrix.os == 'ubuntu-latest'
+        run: just build-linux-nogui
+
+      - name: Upload build artifacts
+        uses: actions/upload-artifact@v3
+        with:
+          name: binaries
+          path: out/ferium*.zip
+          if-no-files-found: error