Add ci to calculator branch

.github/workflows/ci.yml

@@ -0,0 +1,32 @@
+name: Build
+on: [push, pull_request]
+jobs:
+  build-Ubuntu_and_MacOs:
+    strategy:
+      matrix:
+        os: [ubuntu-latest, macos-latest]
+    runs-on: ${{ matrix.os }}
+    steps:
+      - uses: actions/checkout@v4
+      - uses: actions/setup-dotnet@v4
+        with:
+          dotnet-version: '8.x'
+      - name: Build
+        run: for f in $(find . -name "* sln"); do dotnet build $f; done
+      - name: Run tests
+        run: for f in $(find . -name "*.sln"); do dotnet test $f; done
+  build-Windows:
+    runs-on: windows-latest
+    defaults:
+      run:
+        shell: cmd
+    steps:
+      - uses: actions/checkout@v4
+      - uses: actions/setup-dotnet@v4
+        with:
+          dotnet-version: '8.x'
+      - name: Build
+        run: For /R %%I in (*.sln) do dotnet build %%I
+      - name: Run tests
+        run: For /R %%I in (*.sln) do dotnet test %%I
+

README.md

@@ -1 +1,3 @@
+[![GitHub Actions CI](https://github.com/kamendov-maxim/semester2/actions/workflows/ci.yml/badge.svg)](https://github.com/kamendov-maxim/semester2/actions/workflows/ci.yml)
+
 Репозиторий с домашними заданиями для университета