feature request: extract_pe32 command

Nobody has claimed this yet.

I was trying to extract a NERF kernel from an existing BIOS and what I had to do was:

```
$ utk bios extract dir/
$ utk table
```

then I had to find the GUID in the table from the "NERF" name (because the directory structure doesn't include the names)

so then I found the right directory, but the file has the 4 byte EFI section header, so you gotta

```
$ cd
$ dd if=0.sec of=linux.bin bs=1 skip=4
$ file linux.bin
linux.bin: Linux kernel x86 boot executable bzImage, ...
```

A command for doing this would be easier

Start by tracing the existing `utk bios extract` command and the output directory containing `0.sec`; the issue describes the manual `dd` step needed after locating a NERF entry with `utk table`. Done means a new `extract_pe32` command performs that extraction without the manual header removal.

Written by the indexing model from the issue text.