tool: initial implementation of get_data_dump

[cybergrind]

Hello @ttimasdf

I'd like to thank you for a great plugin! Also it is a pure joy too use a tool built to use with uv (and pre-commit) ❤️

This PR adds a new tool get_binary to add ability to retrieve arbitrary pieces of binary from a file. It is helpful when analyzing some embedded resources. I've used it to spot bytecode inside exe built with nuitka and it helped a lot.

Let me know what do you think about it

[ttimasdf]

Hi, cybergrind. Thanks for the contribution ❤️

I've been thinking about a tool to dump binary data too, especially after exploring sidekick recently (#10). A similar MCP tool, get_data_dump, provided by sidekick, is defined like this:

{
    "type": "function",
    "function": {
        "name": "get_data_dump",
        "description": "Return a hex/data listing around a given address (includes known data variables with optional cross-references).",
        "parameters": {
            "type": "object",
            "properties": {
                "address": {
                    "type": "string",
                    "description": "Address in the data section to focus on."
                },
                "window_size": {
                    "type": "integer",
                    "description": "Number of bytes around the address to include (default 128)."
                },
                "include_xrefs": {
                    "type": "boolean",
                    "description": "Whether to include cross-references (default true)."
                }
            },
            "required": [
                "address"
            ]
        }
    }
}

I think it would be great to expose our tool with a similar function name and parameter names. We could skip include_xrefs for now since it's quite a large feature to implement, even in sidekick.

Additionally, moving hex_to_human to utils.py is a good idea to keep things more organized.

[cybergrind]

hi @ttimasdf

all done, could you please check?

[ttimasdf]

Sorry, I've been tied up with work lately. I'll get back to it when I have some free time, hopefully in a week or two.