Add NoOp hooks guide with mdx formatting

[krisoshea-eth]

This PR introduces a detailed guide on NoOp Hooks in Uniswap V4.

Key Features of the Document:

1. Introduction to NoOp hooks and their significance in Uniswap V4
2. Explanation of emergent use-cases enabled by NoOp hooks:
   • Asynchronous swaps and swap-ordering
   • Custom Curves implementation
3. Detailed guide on how to configure a NoOp Hook, including required permissions
4. In-depth explanation of the beforeSwap function implementation for NoOp hooks
5. Step-by-step breakdown of fund movements during a NoOp swap
6. Code snippets for:
   • NoOp Hook configuration
   • beforeSwap function implementation
   • Testing NoOp Hook behavior
7. Important note on the potential risks associated with NoOp hooks

Document Structure:

• Uses MDX formatting with frontmatter
• Provides detailed explanations alongside code snippets
• Follows a logical flow from concept introduction to implementation and testing

Impact and Importance:

This document gives detailed insights into NoOp hooks, which enable powerful customizations of the core swap logic.

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