Add memory allocation support to Binary Ninja Debugger

[Copilot]

This PR implements comprehensive memory allocation and deallocation functionality for the Binary Ninja Debugger, allowing users to allocate memory buffers in target processes during debugging sessions.

Overview

The implementation adds AllocateMemory() and FreeMemory() methods across all debugger adapters, providing a unified interface for dynamic memory management in target processes. This enables advanced debugging scenarios including memory patching, dynamic analysis, and runtime data injection.

Key Features

• Universal API: Added pure virtual methods to DebugAdapter base class with consistent interface across all adapters
• Smart Implementation: Each adapter uses the most appropriate allocation method:
  • LLDB: Native SBProcess::AllocateMemory/DeallocateMemory APIs
  • RSP-based (GDB, Corellium, LldbRsp, ESReven): GDB remote protocol monitor commands
  • Read-only adapters: Appropriate failure responses for core dumps and TTD traces
• Thread Safety: Full support through QueuedAdapter with proper operation queuing
• Complete API Integration: C++ core, FFI bindings, and Python API with documentation

Usage Example

# Allocate 1KB with read/write/execute permissions
addr = dbg.allocate_memory(1024, 0x7)
if addr != 0:
    # Write data to allocated memory
    dbg.write_memory(addr, b"Hello, World!")
    
    # Read it back
    data = dbg.read_memory(addr, 13)
    
    # Clean up
    dbg.free_memory(addr)

Implementation Details

• Permissions: Standard memory protection flags (default 0x7 for read/write/execute)
• Return Values: AllocateMemory() returns 0 on failure, allocated address on success
• Error Handling: Graceful handling of unsupported adapters and network failures
• Testing: Comprehensive unit test covering allocation, I/O operations, and cleanup

Adapter Support

Adapter	Support	Implementation
LldbAdapter	✅ Full	Native LLDB APIs
GDB/Corellium/LldbRsp/ESReven	✅ Partial	RSP monitor commands
DbgEng/CoreDump/TTD	❌ N/A	Returns failure (read-only/unsupported)

The implementation maintains full backward compatibility and provides a solid foundation for advanced debugging workflows.

Fixes #404.

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