Closes

Closes #1902

Description

This PR addresses issue #1902 by adding documentation for GraphQlTesterBuilder and enhancing the ResourceDocumentSource class with a new constructor that accepts a single resource.

Changes Made

1. Enhanced ResourceDocumentSource class

• Added new constructor: ResourceDocumentSource(Resource location) that accepts a single resource location
• Improved flexibility: Users can now specify a single custom location instead of being limited to the default "graphql/" folder or providing a full list of locations
• Maintained backward compatibility: All existing constructors remain unchanged

2. Added GraphQlTesterBuilder documentation example

• Created comprehensive example: Shows how to use GraphQlTesterBuilder with custom document sources
• Demonstrates key features: Custom document source, error filtering, and response timeout configuration
• Follows Spring documentation patterns: Uses proper AsciiDoc tags for code inclusion

3. Updated tests

• Enhanced test coverage: Added tests for the new single resource constructor
• Maintained existing functionality: All existing tests continue to pass

Additional Notes

This enhancement makes the ResourceDocumentSource more user-friendly by providing a middle ground between the default behavior and full customization. The new constructor is particularly useful for applications that need to specify a custom GraphQL schema location while still using the default file extensions.