Move dependencies in 'external' directory and pdate git submodules

external/Catch2/.github/workflows/windows-simple-builds.yml

@@ -0,0 +1,37 @@
+name: Windows builds (basic)
+
+on: [push, pull_request]
+
+jobs:
+  build:
+    name: ${{matrix.os}}, ${{matrix.std}}, ${{matrix.build_type}}, ${{matrix.platform}}
+    runs-on: ${{matrix.os}}
+    strategy:
+      matrix:
+        os: [windows-2019, windows-2022]
+        platform: [Win32, x64]
+        build_type: [Debug, Release]
+        std: [14, 17]
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Configure build
+        working-directory: ${{runner.workspace}}
+        run: |
+          cmake -S $Env:GITHUB_WORKSPACE               `
+                -B ${{runner.workspace}}/build         `
+                -DCMAKE_CXX_STANDARD=${{matrix.std}}   `
+                -A ${{matrix.platform}}                `
+                --preset all-tests
+
+      - name: Build tests
+        working-directory: ${{runner.workspace}}
+        run: cmake --build build --config ${{matrix.build_type}} --parallel %NUMBER_OF_PROCESSORS%
+        shell: cmd
+
+      - name: Run tests
+        working-directory: ${{runner.workspace}}/build
+        env:
+            CTEST_OUTPUT_ON_FAILURE: 1
+        run: ctest -C ${{matrix.build_type}} -j %NUMBER_OF_PROCESSORS%
+        shell: cmd