chore: add solhint and rules

[filmakarov]

PR-Codex overview

This PR focuses on improving the codebase by optimizing imports, enhancing linting configurations, and adding new workflows for Solidity linting and Foundry tests. It also includes updates to contracts and test files for better readability and functionality.

Detailed summary

• Removed .github/workflows/test.yml.solhintignore.
• Added node_modules/, lib/, and scripts/ to .gitignore.
• Updated IMEE.sol to have a space after the interface declaration.
• Created .solhint.json with custom rules.
• Refactored import statements for consistency.
• Adjusted foundry.toml settings for line length and verbosity.
• Added changelog entries in CHANGELOG.md.
• Updated remappings.txt for rlp-reader.
• Improved formatting in several Solidity files for readability.
• Added new GitHub workflows for Solidity linting and Foundry tests.
• Enhanced error handling in EtherForwarder contract.
• Versioning added to NodePaymaster and NodePaymasterFactory.
• Refactored functions to improve clarity and maintainability.
• Added event emissions in EmittingNodePaymaster.
• Updated test cases for consistency and improved readability.
• General code clean-up and linting improvements across multiple files.

The following files were skipped due to too many changes: test/unit/node-paymaster/fixed-premium/FixedPremium_Test.t.sol, contracts/BaseNodePaymaster.sol, test/unit/node-paymaster/percentage-premium/PercentagePremium_Test.t.sol, contracts/validators/K1MeeValidator.sol, test/Base.t.sol, pnpm-lock.yaml

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