feat: new evm reference guide

[ghost]

What is the purpose of the change?

These updates aim to improve the evm section devex by clearly reorganizing and enhancing the Sei EVM RPC Reference Guide.

• Clarify JSON-RPC endpoint documentation for improved readability
• Introduce structured categorization of endpoints
• Expand documentation on Sei-specific endpoints and synthetic transactions

Describe the changes to the documentation

• Improves categorization of RPC endpoints (Transactions, Accounts, Blocks, Filters, Simulation, Debugging).
• Use of expandable sections for detailed endpoint specifications and examples.
• Improves descriptions and clear formatting of standard Ethereum JSON-RPC endpoints.
• Introduce docs and examples for Sei-specific endpoints, particularly synthetic transactions and cross-VM functionalities.
• Explicit error-handling section with Sei-specific JSON-RPC error codes.
• Added practical examples demonstrating real-world use cases.
• Included performance considerations and best practices for RPC interactions.

[cordt-sei]

So clean. Looks good!