Refactor CI workflow to support multiple OS

Updated job configuration to use a matrix strategy for OS compatibility.

Author: priyagupta108

.github/workflows/python-app.yml

@@ -84,26 +84,41 @@ name: repro-setup-python-root-warning
 on:
   push:
 
+# jobs:
+#   repro:
+#     runs-on: ubuntu-latest
+#     container:
+#       image: ubuntu:24.04
+#       options: --user root
+#     steps:
+#       - name: Install prerequisites
+#         run: |
+#           apt-get update
+#           apt-get install -y curl ca-certificates git
+
+#       - name: Check user
+#         run: |
+#           whoami
+#           id -u
+
+#       - name: Set up Python
+#         # uses: actions/setup-python@v6
+#         # uses: lmvysakh/setup-python@rootuser_warning_fix
+#         uses: priyagupta108/setup-python@pip-root-user-warning
+#         with:
+#           python-version: '3.13.7'
+
+#       - name: Show pip version
+#         run: python -m pip --version
 jobs:
   repro:
-    runs-on: ubuntu-latest
-    container:
-      image: ubuntu:24.04
-      options: --user root
+    runs-on: ${{ matrix.os }}
+    strategy:
+      matrix:
+        os: [ubuntu-latest, windows-latest, macos-latest]
     steps:
-      - name: Install prerequisites
-        run: |
-          apt-get update
-          apt-get install -y curl ca-certificates git
-
-      - name: Check user
-        run: |
-          whoami
-          id -u
-
+      - uses: actions/checkout@v4
       - name: Set up Python
-        # uses: actions/setup-python@v6
-        # uses: lmvysakh/setup-python@rootuser_warning_fix
         uses: priyagupta108/setup-python@pip-root-user-warning
         with:
           python-version: '3.13.7'