fix: Add gettext installation for macOS

- Install gettext using Homebrew on macOS runners
- Force link gettext to resolve library dependency
- Conditional execution only on macOS

.github/workflows/ci.yml

@@ -19,6 +19,13 @@ jobs:
     steps:
       - uses: actions/checkout@v3
 
+      # Install gettext on macOS
+      - name: Install gettext on macOS
+        if: runner.os == 'macOS'
+        run: |
+          brew install gettext
+          brew link gettext --force
+          
       - name: Set up Python ${{ matrix.python-version }}
         uses: actions/setup-python@v4
         with: