Update build options and DwarFS mount options

Change the order of checking and setting portable home dir

Add tracking of the use of the image directory by processes running f…

…rom it

Add reuse mount point and unmounting of the mount directory with a delay
Minor fixes

Update DwarFS v0.12.4

Update Squashfuse v0.6.1
Add the ability to create and use ${RUNTIME_NAME}.share dir to use as $XDG_DATA_HOME
Add the ability to use ${RUNTIME_NAME}.env file for set/unset env vars
Minor fixes

Update name of runimage extract and run dir

Update memfd-exec fallback

Add env var NO_MEMFDEXEC=1 Do not use memfd-exec (use a temporary file instead)
Update fuse mount options to work in Ubuntu 25.04 (apparmor fusermount3 profile)

Update DwarFS v0.12.3

Update DwarFS v0.12.2

Minor fixes