feat(perps): add --symbol and --leverage options to leverage command (Vibe Kanban)

[MinaraAgent]

Summary

• Add -s, --symbol <TOKEN> option for specifying target token symbol (ETH, SOL, BTC, etc.)
• Add -l, --leverage <VALUE> option for specifying leverage multiplier (2, 3, 5, 10, etc.)
• Add validation for symbol (must be supported) and leverage (must be >= 1 and within max for symbol)
• Default to cross margin mode when both options are provided (non-interactive)
• Keep interactive mode as fallback when parameters not provided

Implementation Details

• Added LeverageOpts interface to type the command options
• Symbol validation checks against fetched Hyperliquid asset metadata
• Leverage validation ensures value is numeric, >= 1, and within the asset's max leverage
• In non-interactive mode, cross margin is used as the default
• Added comprehensive test coverage for all new functionality

CLI Usage

# Set ETH leverage to 2x (non-interactive)
minara perps leverage -s ETH -l 2

# Set SOL leverage to 3x on a specific wallet
minara perps leverage -w trading -s SOL -l 3

# Interactive mode (fallback)
minara perps leverage

Test Cases

• Non-interactive mode with --symbol and --leverage flags
• Specific wallet targeting with --wallet flag
• Rejection of invalid symbols
• Rejection of leverage exceeding maximum for symbol
• Rejection of invalid leverage values (non-numeric or below 1)
• Fallback to interactive mode when flags not provided

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This PR was written using Vibe Kanban