Log redirections too

[kurth4cker]

Problem

Currently when redirecting a commands inpout/output to a file, they are not logged. There is only command and arguments.

[INFO] CMD: cat

This patch adds a new type and functions which keeps file names with Nob_Fd and then prints like this:

[INFO] CMD: cat < input.txt > output.txt 2> error.txt

Here is a snippet uses new type.

#define NOB_EXPERIMENTAL_DELETE_OLD
#define NOB_IMPLEMENTATION
#include "nob.h"

int
main(int argc, char **argv)
{
    NOB_GO_REBUILD_URSELF_PLUS(argc, argv, "nob.h");

    Nob_Cmd *cmd = &(Nob_Cmd) { 0 };
    Nob_File fin = nob_file_open_for_read("pfork.1.scd");
    Nob_File fout = nob_file_open_for_write("pfork.1");
    nob_cmd_append(cmd, "scdoc");
    if (fin.fd == NOB_INVALID_FD
        || fout.fd == NOB_INVALID_FD
        || !nob_cmd_run_sync_redirect_file_and_reset(cmd, (Nob_Cmd_Redirect_File) {
            .fin = &fin,
            .fout = &fout,
    })) {
        nob_log(NOB_WARNING, "cannot run scdoc");
    }
    nob_file_close(fin);
    nob_file_close(fout);
}

Snippet is taken from my toy project:
https://github.com/kurth4cker/pfork/blob/635dca997d13bb1813adc5dc25030e287034ca72/nob.c

Notes

I'm not sure about this solution. I tried to not break current API. And it
is not complete yet. Please tell me your ideas about this.