Implement AI code review suggestions

- Enhanced SSL function documentation with detailed examples and environment variable precedence
- Added CA bundle file format validation (.pem, .crt, .cer) with warnings for unsupported formats
- Improved error handling with structured solutions and current CA bundle path display
- Added comprehensive tests for file format validation and warning scenarios
- Enhanced user guidance for SSL certificate configuration issues

Addresses feedback from joaomdmoura's AI code review for better documentation,
error handling, and path validation as requested.

Co-Authored-By: João <joao@crewai.com>

tests/cli/test_provider_ssl.py

@@ -71,6 +71,35 @@ class TestSSLConfiguration:
                 result = get_ssl_verify_config()
                 assert result == '/path/to/certifi/cacert.pem'
 
+    def test_get_ssl_verify_config_file_format_validation(self):
+        """Test that CA bundle file format validation works correctly."""
+        with tempfile.NamedTemporaryFile(suffix=".pem", delete=False) as temp_file:
+            temp_path = temp_file.name
+        
+        try:
+            with patch.dict(os.environ, {"REQUESTS_CA_BUNDLE": temp_path}):
+                result = get_ssl_verify_config()
+                assert result == temp_path
+        finally:
+            os.unlink(temp_path)
+
+    def test_get_ssl_verify_config_unsupported_format_warning(self):
+        """Test that unsupported file formats still work but show warning."""
+        with tempfile.NamedTemporaryFile(suffix=".txt", delete=False) as temp_file:
+            temp_path = temp_file.name
+        
+        try:
+            with patch.dict(os.environ, {"REQUESTS_CA_BUNDLE": temp_path}):
+                with patch('click.secho') as mock_secho:
+                    result = get_ssl_verify_config()
+                    assert result == temp_path
+                    mock_secho.assert_called_with(
+                        f"Warning: CA bundle file {temp_path} may not be in expected format (.pem, .crt, .cer)", 
+                        fg="yellow"
+                    )
+        finally:
+            os.unlink(temp_path)
+
 
 class TestFetchProviderDataSSL:
     def test_fetch_provider_data_uses_ssl_config(self):
@@ -99,7 +128,8 @@ class TestFetchProviderDataSSL:
                 
                 assert result is None
                 mock_secho.assert_any_call("SSL certificate verification failed: SSL verification failed", fg="red")
-                mock_secho.assert_any_call("Try setting REQUESTS_CA_BUNDLE environment variable to your CA bundle path", fg="yellow")
+                mock_secho.assert_any_call("Solutions:", fg="cyan")
+                mock_secho.assert_any_call("  1. Set REQUESTS_CA_BUNDLE environment variable to your CA bundle path", fg="yellow")
 
     def test_fetch_provider_data_general_request_error(self):
         cache_file = Path("/tmp/test_cache.json")