ci: test on Windows and MacOS (#109)

### Summary of Changes

Also run tests on Windows and MacOS. Behavior of `torch` and Python's
multiprocessing is platform-dependent.

.github/workflows/main.yml

@@ -1,4 +1,5 @@
 name: Main
+
 on:
   push:
     branches: [ main ]
@@ -7,14 +8,19 @@ jobs:
   poetry-with-codecov:
     strategy:
       matrix:
+        platform:
+          - "ubuntu-latest"
+          - "macos-latest"
+          - "windows-latest"
         python-version:
-          - '3.11'
-          - '3.12'
+          - "3.11"
+          - "3.12"
     uses: lars-reimann/.github/.github/workflows/poetry-codecov-reusable.yml@main
     with:
       working-directory: .
+      platform: ${{ matrix.platform }}
       python-version: ${{ matrix.python-version }}
       module-name: safeds_runner
-      coverage: ${{ matrix.python-version == '3.11' }}
+      coverage: ${{ matrix.platform == 'ubuntu-latest' && matrix.python-version == '3.11' }}
     secrets:
       CODECOV_TOKEN: ${{ secrets.CODECOV_TOKEN }}

.github/workflows/pr.yml

@@ -2,7 +2,7 @@ name: Pull Request
 
 on:
   pull_request:
-    branches: [main]
+    branches: [ main ]
 
 concurrency:
   group: ${{ github.head_ref }}-${{ github.workflow }}
@@ -12,14 +12,19 @@ jobs:
   poetry-with-codecov:
     strategy:
       matrix:
+        platform:
+          - "ubuntu-latest"
+          - "macos-latest"
+          - "windows-latest"
         python-version:
-          - '3.11'
-          - '3.12'
+          - "3.11"
+          - "3.12"
     uses: lars-reimann/.github/.github/workflows/poetry-codecov-reusable.yml@main
     with:
       working-directory: .
+      platform: ${{ matrix.platform }}
       python-version: ${{ matrix.python-version }}
       module-name: safeds_runner
-      coverage: ${{ matrix.python-version == '3.11' }}
+      coverage: ${{ matrix.platform == 'ubuntu-latest' && matrix.python-version == '3.11' }}
     secrets:
       CODECOV_TOKEN: ${{ secrets.CODECOV_TOKEN }}

pyproject.toml

@@ -32,12 +32,14 @@ simple-websocket = "^1.0.0"
 torch = [
     # Install the CUDA version on Windows. Projects that depend on us always get their dependencies from PyPI, so
     # there's no point moving this to the main dependencies section.
-    { version = "^2.3.0", markers="sys_platform == 'win32'", source = "torch_cuda121" },
+    { version = "^2.3.0", markers="sys_platform == 'win32'", source = "torch_cuda" },
+    { version = "^2.3.0", markers="sys_platform != 'win32'", source = "pypi" },
 ]
 torchvision = [
     # Install the CUDA version on Windows. Projects that depend on us always get their dependencies from PyPI, so
     # there's no point moving this to the main dependencies section.
-    { version = "^0.18.0", markers="sys_platform == 'win32'", source = "torch_cuda121" },
+    { version = "^0.18.0", markers="sys_platform == 'win32'", source = "torch_cuda" },
+    { version = "^0.18.0", markers="sys_platform != 'win32'", source = "pypi" },
 ]
 
 [tool.poetry.group.docs.dependencies]
@@ -46,7 +48,7 @@ mkdocs-glightbox = "^0.3.4"
 mkdocs-material = "^9.1.17"
 
 [[tool.poetry.source]]
-name = "torch_cuda121"
+name = "torch_cuda"
 url = "https://download.pytorch.org/whl/cu121"
 priority = "explicit"