feat: add base and example-test-image targets

[RiSKeD]

No description provided.

[Copilot]

Pull Request Overview

This PR introduces a complete NixOS-based FirmwareCI base image system with modular configuration. The implementation provides a foundation for hardware testing environments that can be easily extended and customized.

• Adds complete Nix flake configuration with modular base and kernel modules
• Implements chipsec package with kernel driver support and multiple build targets
• Sets up comprehensive CI/CD pipeline with linting, formatting, and build validation

Reviewed Changes

Copilot reviewed 16 out of 18 changed files in this pull request and generated 2 comments.

Show a summary per file

File	Description
flake.nix	Main flake configuration defining build targets and NixOS configurations
modules/base.nix	Base system configuration module with firmware testing tools
modules/kernel.nix	Kernel configuration module with customizable version and modules
pkgs/chipsec/default.nix	Chipsec package definition with conditional kernel driver support
pkgs/default-tools/default.nix	Default tools package for FirmwareCI testing
README.md	Comprehensive documentation with usage examples and configuration options
Makefile	Build automation for different image targets
.github/workflows/*	CI/CD workflows for Nix flake validation and commit linting

Comments suppressed due to low confidence (2)

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