docs: Update README.md with Contracts Overview & Testing Documentation

[Verifieddanny]

docs: Update README with Contracts Overview & Testing Documentation

Description

This PR comprehensively updates the README.md to improve developer onboarding and project transparency.

Key Additions

📜 Contracts Overview

• Added detailed architecture of core contracts (Weaver, WeaverNFT, Protocol contracts)
• Clear explanation of contract interactions and data flow
• Interface documentation

🧪 Testing Documentation

• Complete setup instructions for test environment
• Test execution commands with examples
• Coverage explanation of what tests verify
• Test structure overview

🏗️ Protocol Explanation

• Enhanced description of Weaver's purpose and value proposition
• Added concrete use cases and benefits
• Technical architecture overview

✨ Developer Experience Improvements

• Structured installation/setup guide
• Well-organized documentation sections
• Added Additional Resources with relevant links
• Clear section headers and consistent formatting

Impact

Area	Improvement
Contributor Onboarding	Makes the project more accessible to new contributors
Code Understanding	Provides clear expectations about the codebase structure
Maintenance	Documents testing procedures for maintainers
Adoption	Better communicates the protocol's value to potential users

Verification

• All technical details verified against implementation
• Test commands validated in fresh environment
• Documentation follows project conventions
• Links tested and working

Resolves #85
@Samuel1-ona Kindly review

[Samuel1-ona]

Nices!!