refactor: Improve TypeScript configuration and enhance LibSqlMemoryServer functionality

- Updated tsconfig.json to include package.json in the include array for better type resolution.
- Refactored import statements in src/index.ts for consistency in quotation marks.
- Enhanced the LibSqlMemoryServer class by integrating versioning from package.json and improving tool capabilities with detailed configurations for create_entities, search_nodes, read_graph, and create_relations.
- Improved error handling and logging within the request handlers to ensure clarity and maintainability.
- Ensured all changes maintain existing functionality while enhancing code readability and structure.

Author: spences10