- Remove internal files (Claude.md, JSON_IMPLEMENTATION_NOTES.md) from repo
- Add .gitignore for build directories and IDE files
- Create comprehensive README.md with quick start guide
- Add detailed example documentation:
  - basic-types.md: string, int, double, bool serialization
  - containers.md: vector, set, array, map examples
  - optional-variant.md: std::optional and std::variant usage
  - enums.md: enum serialization with converters
  - attributes.md: XML attributes and JSON @ prefix
  - custom-types.md: creating serializers for custom structures