documentation not clear and failre when using example

I'm attempting to use microzig, and I'm also very new to zig and the instructions in README.adoc assume that you have a lot of knowledge about zig and how microzig works.

I attempted to use the sample and despite inferring how to make it work, even with modifications, it fails to compile.

run: zig init-exe

undocumented commands (implied via the vague statement: add the hardware support package as a submodule, this is also the "simple way" as zig init-exe doesn't do a git init, so can't do some git submodule command to add it):

mkdir deps
cd deps
git clone --recursive https://github.com/ZigEmbeddedGroup/microchip-atmega
cd ..

replace build.zig (undocumented what file, and need to replace hardware_support_package with microchip-atmega and replace root_source_file with source_file) w/:

const std = @import("std");
const atmega = @import("deps/microchip-atmega/build.zig");

// the hardware support package should have microzig as a dependency
const microzig = @import("deps/microchip-atmega/deps/microzig/build.zig");

pub fn build(b: *std.build.Builder) !void {
    const optimize = b.standardOptimizeOption(.{});
    var exe = microzig.addEmbeddedExecutable( b, .{
        .name = "my-executable",
        .source_file = .{
            .path = "src/main.zig",
        },
        .backing = .{
            .board = atmega.boards.arduino_nano,

            // instead of a board, you can use the raw chip as well
            // .chip = atmega.chips.atmega328p,
        },
        .optimize = optimize,
    });
    exe.install();
}

replace src/main.zig with the next block (undocumented what file to put it in).

run zig build and see the following failure:

$ zig build
zig build-exe my-executable Debug avr-freestanding-eabi: error: the following command terminated unexpectedly:
[xxx]/github/zig/build/zig2 build-exe /private/tmp/mcre/deps/microchip-atmega/deps/microzig/src/start.zig -fno-strip --cache-dir /private/tmp/mcre/zig-cache --global-cache-dir [xxx]/.cache/zig --name my-executable -fno-compiler-rt -fsingle-threaded -target avr-freestanding-eabi -mcpu avr5 --script /private/tmp/mcre/zig-cache/microzig/bad2341405a5fe8c06f6286f91ea1100/ATmega328P_AVR5.ld --mod microzig:config,chip,cpu,hal,board:/private/tmp/mcre/deps/microchip-atmega/deps/microzig/src/microzig.zig --mod chip:microzig:/private/tmp/mcre/deps/microchip-atmega/src/chips/ATmega328P.zig --mod board:microzig:/private/tmp/mcre/deps/microchip-atmega/src/boards/arduino_nano.zig --mod hal:microzig:/private/tmp/mcre/deps/microchip-atmega/src/hals/ATmega328P.zig --mod app:microzig:/private/tmp/mcre/src/main.zig --mod cpu:microzig:/private/tmp/mcre/deps/microchip-atmega/deps/microzig/src/modules/cpus/avr5.zig --mod config::/private/tmp/mcre/zig-cache/microzig/config-6df6165a62f30831cad66fa94379f8d3.zig --deps app,microzig --enable-cache --listen=- 
Build Summary: 1/4 steps succeeded; 1 failed (disable with -fno-summary)
install transitive failure
└─ install my-executable transitive failure
   └─ zig build-exe my-executable Debug avr-freestanding-eabi failure
      └─ linkerscript success
error: the following build command failed with exit code 1:
/private/tmp/mcre/zig-cache/o/b840765e239219fa1562b810d024cd97/build [xxx]/github/zig/build/zig2 /private/tmp/mcre /private/tmp/mcre/zig-cache [xxx]/.cache/zig

environment: MacOS Ventura 13.2

zig version: 0.11.0-dev.2249+dcdb87836

I'm unsure what to do now to make the necessary executable.

ZigEmbeddedGroup / microzig

documentation not clear and failre when using example #119