feat: add search_bytes(), CLI config, and convenience views

[0xeb]

Summary

• Add search_bytes() and search_first() SQL functions for binary pattern matching
• Add --config CLI flag for persistent settings
• Enable AI agent by default
• Add convenience views: callers, callees, string_refs for common xref queries
• Update agent prompt with documentation

New Features

Binary Search Functions

SELECT search_bytes('48 8B ?? 00');  -- Returns JSON array of matches
SELECT search_first('CC CC CC');     -- Returns first match address or NULL

CLI Config

idasql --config set ai.provider claude
idasql --config get ai.provider

Convenience Views

-- Who calls a function?
SELECT caller_name FROM callers WHERE func_addr = 0x401000;

-- What does a function call?
SELECT callee_name FROM callees WHERE func_name LIKE '%main%';

-- Find functions by string content
SELECT func_name FROM string_refs WHERE string_value LIKE '%error%';

Test plan

• Build and run existing tests
• Test search_bytes with various patterns
• Test views return expected columns and data
• Test --config flag