CI: add the first pipeline to build the application and run basic tes…

…ts (#16)

This PR should close #6.
Requires
- #2 to be merged

---
This PR adds a slightly modified default action from _GitHub_ for
`CMake`-based projects 👍

I did run the pipeline on my personal fork, which resulted in [this
action
log](https://github.com/amtoine/wiresmash/actions/runs/3670185074/jobs/6204543791)
on the tip of the branch of #2 👍
this means that the tests will pass when the PR is ready 💪 

## NOTES
- this pipeline won't work on `windows` hence the single `ubuntu-latest`
in the matrix of OSes 🤔
- i've let the comments from the default configuration file, just for
reference 👍
- there are not tests to run, so they pass 👌

.github/workflows/build.yml

@@ -0,0 +1,41 @@
+name: Build Wiresmash with CMake
+
+on:
+  push:
+    branches: [ "main" ]
+  pull_request:
+    branches: [ "main" ]
+
+env:
+  BUILD_TYPE: Release
+
+jobs:
+  build:
+    runs-on: ${{ matrix.os }}
+    strategy:
+      # See: https://docs.github.com/en/free-pro-team@latest/actions/learn-github-actions/managing-complex-workflows#using-a-build-matrix
+      matrix:
+        os: [ubuntu-latest]
+
+    steps:
+    - uses: actions/checkout@v3
+
+    - name: Install the dependencies
+      run: sudo apt install build-essential libsfml-dev
+
+    # Configure CMake in a 'build' subdirectory. `CMAKE_BUILD_TYPE` is only required if you are using a single-configuration generator such as make.
+    # See https://cmake.org/cmake/help/latest/variable/CMAKE_BUILD_TYPE.html?highlight=cmake_build_type
+    - name: Configure CMake
+      # the equivalent of `cmake -S ./ -B ./build/` in the `README`
+      run: cmake -S ${{github.workspace}} -B ${{github.workspace}}/build -DCMAKE_BUILD_TYPE=${{env.BUILD_TYPE}}
+
+    # Build your program with the given configuration
+    - name: Build the application
+      # the equivalent of `cmake --build ./build/` in the `README`
+      run: cmake --build ${{github.workspace}}/build --config ${{env.BUILD_TYPE}}
+
+    # Execute tests defined by the CMake configuration.
+    # See https://cmake.org/cmake/help/latest/manual/ctest.1.html for more detail
+    - name: Test
+      working-directory: ${{github.workspace}}/build
+      run: ctest -C ${{env.BUILD_TYPE}}