IND-426 | Add Comprehensive UI-SDK Developer Documentation Guide

[enis-incentiv]

Story:
https://incentiv-net.atlassian.net/browse/IND-426

Description:
This PR introduces a complete developer documentation guide for the UI-SDK, providing clear instructions and examples for all major functionality. The guide covers:

Key Components:

• Account Abstraction Provider creation (EOA and Passkey-based)
• Transaction operations (single and batch)
• Contract deployment with CREATE2 support
• Gas management and estimation
• Basic ethers.js interactions

Documentation Structure:

1. Introduction and Account Abstraction overview
2. Installation instructions
3. Detailed implementation guides for:
   • Creating EOA-based AA providers (MetaMask integration)
   • Creating Passkey-based AA providers (registration, authentication, signing)
   • Sending transactions (single and batch)
   • Deploying contracts (with address prediction and salt management)
   • Managing gas (estimation and pricing)
   • Basic blockchain interactions

Each section includes:

• Clear explanations of concepts
• Complete code examples
• Configuration requirements
• Error handling patterns
• Best practices and considerations

The guide serves as a comprehensive reference for developers implementing Account Abstraction using the UI-SDK, with a focus on practical, production-ready implementations.