fix: Switch to space-separated sources.conf format

- Change from colon to space separation to avoid URL parsing issues
- Update sources.conf format: TYPE NAME URL VERSION BUILD_FUNCTION [EXTRA]
- Implement awk-based parsing for reliable field extraction
- Fix firmware package list (remove unavailable linux-firmware-marvell)

initramfs/usr/lib/udev/rules.d/70-memory.rules

@@ -0,0 +1,8 @@
+# do not edit this file, it will be overwritten on update
+
+ACTION=="remove", GOTO="memory_end"
+SUBSYSTEM!="dmi", GOTO="memory_end"
+
+IMPORT{program}="dmi_memory_id"
+
+LABEL="memory_end"