feat: Implement complete Zero OS Alpine Initramfs Builder

- Complete bash framework with strict error handling
- Modular library system (docker, alpine, components, initramfs, kernel, testing)
- Rust component integration (zinit, rfs, mycelium) with musl targeting
- Rootless Docker/Podman support for GitHub Actions
- Centralized configuration in config/build.conf
- 2-stage module loading system
- Strip + UPX optimization for minimal size
- Complete zinit integration replacing OpenRC
- GitHub Actions CI/CD pipeline
- Comprehensive documentation and usage guides

Components:
- Latest stable kernel 6.12.44
- Alpine Linux 3.22 base
- ThreeFold components: zinit, mycelium, rfs, corex
- Target: ~8-12MB final initramfs.cpio.xz

configs/modules-essential.list

@@ -0,0 +1,59 @@
+# Essential kernel modules for Zero-OS Alpine initramfs
+# This file contains a curated list of essential modules for network and storage functionality
+# Comments are supported (lines starting with #)
+
+# Network drivers - Intel
+e1000
+e1000e
+igb
+ixgbe
+i40e
+ice
+
+# Network drivers - Realtek
+r8169
+8139too
+8139cp
+
+# Network drivers - Broadcom
+bnx2
+bnx2x
+tg3
+b44
+
+# Network drivers - Atheros
+atl1
+atl1e
+atl1c
+alx
+
+# VirtIO drivers
+virtio_net
+virtio_scsi
+virtio_blk
+virtio_pci
+
+# Tunnel and container support
+tun
+overlay
+
+# Storage subsystem (essential only)
+scsi_mod
+sd_mod
+
+# Control Groups (cgroups v1 and v2) - essential for container management
+cgroup_pids
+cgroup_freezer
+cgroup_perf_event
+cgroup_device
+cgroup_cpuset
+cgroup_bpf
+cgroup_debug
+memcg
+blkio_cgroup
+cpu_cgroup
+cpuacct
+hugetlb_cgroup
+net_cls_cgroup
+net_prio_cgroup
+devices_cgroup