ci: add github ci intergration to ensure PRs build successfully

This adds GitHub Actions integration to automatically build (and run
tests, should they be added in the future) on Windows, MacOS, and Linux.

This will (hopefully) prevent issues like Spagett1gh-87 (introduced by Spagett1gh-83)
from recurring in the future.

Related-to: Spagett1gh-83, Spagett1gh-86, Spagett1gh-87

Author: acuteaangle

.github/workflows/tests.yaml

@@ -0,0 +1,33 @@
+name: Cargo Tests
+
+on:
+  - push
+  - pull_request
+
+env:
+  CARGO_TERM_COLOR: always
+
+jobs:
+  test:
+    name: Build and Test
+    runs-on: ${{ matrix.os }}
+    strategy:
+      matrix:
+        os:
+          - windows-latest
+          - macos-latest
+          - ubuntu-latest
+        toolchain:
+          - stable
+          - beta
+          - nightly
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v4
+      - name: Install ${{ matrix.toolchain}} Rust toolchain
+        run: rustup update ${{ matrix.toolchain }} && rustup default ${{ matrix.toolchain }}
+      - if: matrix.os == 'ubuntu-latest'
+        name: Install Linux build dependencies
+        run: sudo apt-get -yq install libgtk-3-dev libudev-dev
+      - name: Run cargo tests
+        run: cargo test --verbose