fix: major build system improvements and container output issues

- Fix container output visibility with proper TTY handling and debug mode
- Fix build order: kernel modules built before initramfs creation
- Implement two-stage kernel build to resolve chicken-and-egg dependency
- Fix sed command issues in kernel configuration with direct execution
- Add diffutils package to container for proper kernel build support
- Enhance NIC module/firmware correlation with intelligent selection
- Fix module staging logic: all NICs loaded in stage1 before network up
- Add smart firmware installation based on module requirements
- Create comprehensive function documentation (scripts/functionlist.md)
- Add debug container script for troubleshooting

Major fixes:
* Container builds now show real-time output
* Kernel builds work with proper GNU diff support
* Module/firmware selection optimized for common hardware
* Build process handles dependencies correctly
* Documentation provides complete function reference

initramfs/etc/apk/world

@@ -1,4 +1,5 @@
 alpine-baselayout
+alpine-baselayout-data
 alpine-keys
 alpine-release
 apk-tools

initramfs/lib/apk/db/triggers

@@ -1,4 +0,0 @@
-Q1IVWNSWjzHcw3fA8n2um7DzK7JdI= /bin /usr/bin /sbin /usr/sbin /lib/modules/* /usr/lib/modules/*
-Q1wtrrIiQ7otRM4/dTa6AVX00eiyU= /usr/lib/udev/rules.d
-Q1nQVdVY0moIk+Sd3jLkgF647gphQ= /lib/udev/hwdb.d /usr/lib/udev/hwdb.d
-Q1J6dzc8oSZYD4Ty6fZMIEKimkMto= /lib/modules/* /usr/lib/modules/*