This pull request introduces significant documentation improvements and new advanced guides for the cheqd TypeScript SDK, focusing on decentralized identity management and fee strategies. The changes add a new SDK section with comprehensive explanations, usage examples, and module references, making it easier for developers to understand and use the SDK for DID and DID-Linked Resource operations. Updates also clarify terminology and fix minor typos in existing documentation.

SDK Documentation Additions and Improvements

• Added a new advanced SDK section to the documentation, including an overview (advanced/sdk/README.md) and detailed guides for DID management, resource management, fee abstraction, dynamic fees, and simulation/gas optimization. These guides cover installation, setup, core features, advanced fee strategies, and integration patterns for the cheqd TypeScript SDK. [1] [2]
• Introduced a detailed DID Module overview (advanced/sdk/did-module/README.md) explaining supported operations, key management, service endpoints, error handling, best practices, migration, and W3C compliance. Includes step-by-step code examples for creating, updating, and deactivating DIDs.

Terminology and Content Updates

• Updated terminology in the DID Registrar documentation to consistently refer to DID-Linked Resources (DLRs) and fixed minor typos in headings and video embed descriptions. [1] [2]

These changes make the documentation more comprehensive and developer-friendly, especially for advanced identity and fee management features in the cheqd SDK.