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/60-block.rules

@@ -0,0 +1,13 @@
+# do not edit this file, it will be overwritten on update
+
+# enable in-kernel media-presence polling
+ACTION=="add", SUBSYSTEM=="module", KERNEL=="block", ATTR{parameters/events_dfl_poll_msecs}=="0", \
+  ATTR{parameters/events_dfl_poll_msecs}="2000"
+
+# forward scsi device event to corresponding block device
+ACTION=="change", SUBSYSTEM=="scsi", ENV{DEVTYPE}=="scsi_device", TEST=="block", ATTR{block/*/uevent}="change"
+
+# watch metadata changes, caused by tools closing the device node which was opened for writing
+ACTION!="remove", SUBSYSTEM=="block", \
+  KERNEL=="loop*|mmcblk*[0-9]|msblk*[0-9]|mspblk*[0-9]|nvme*|sd*|vd*|xvd*|bcache*|cciss*|dasd*|ubd*|ubi*|scm*|pmem*|nbd*|zd*", \
+  OPTIONS+="watch"