xfs: fixing bugs, Enable Werror

Fixed bug on reading files inside Haiku using CAT command on shell

Fixed bug on reading small directories inside Haiku

Node directories can now be read fine, which fixes #17839

LongBlock verification is now through common VerifyHeader function

Change-Id: I1eb651bd084580c86d0facb919825e94488e43d2
Reviewed-on: https://review.haiku-os.org/c/haiku/+/5546
Tested-by: Commit checker robot <no-reply+buildbot@haiku-os.org>
Reviewed-by: Adrien Destugues <pulkomandy@pulkomandy.tk>

xfs: version 3 Inodes and shortform directory

- Implemented xfs v5 inodes (known as v3 inodes) and necessary metadata integrity checks

- Implemented correct data fork pointer which handles both xfs v4 and v5 directories

- We can now read inodes and shortform directories for both xfs versions completely fine

Change-Id: I8a75ec1dc663d567d3bf6db64be4a27b55d709b3
Reviewed-on: https://review.haiku-os.org/c/haiku/+/5396
Reviewed-by: Adrien Destugues <pulkomandy@pulkomandy.tk>
Tested-by: Commit checker robot <no-reply+buildbot@haiku-os.org>

xfs : Enabling -Werror and fixing all build issues that result

This patch will fix almost all warnings we have in xfs code.
There are some which I haven't fixed yet, I added comments on
part of code which is giving error and its type as well.

I tested all the changes on xfs_shell and everything is
working fine.

Change-Id: I1af1d09e7eab7f2c2397193bd5a584c5d40c424c
Reviewed-on: https://review.haiku-os.org/c/haiku/+/5257
Tested-by: Commit checker robot <no-reply+buildbot@haiku-os.org>
Reviewed-by: Adrien Destugues <pulkomandy@gmail.com>

xfs: Reading Node Directories

Node directories can now be read. With this, extent directories are
complete.
Change-Id: Ic42c8464e810137cff4946e8c975edc121daaa4f
Reviewed-on: https://review.haiku-os.org/c/haiku/+/3045
Reviewed-by: Adrien Destugues <pulkomandy@gmail.com>

xfs: Read Block directories

Block directories can now be read.
Change-Id: I9aa898638e6ac39cb903f2dd58cd184785e1a06b
Reviewed-on: https://review.haiku-os.org/c/haiku/+/2992
Reviewed-by: Adrien Destugues <pulkomandy@gmail.com>

xfs: Read Short Form Directories

We can now read short form directories.
Change-Id: I23eb6ef52e8bb07643213e603ed0185f536c649f
Reviewed-on: https://review.haiku-os.org/c/haiku/+/2952
Reviewed-by: Adrien Destugues <pulkomandy@gmail.com>

xfs: An attempt at reading shortform dir

This patch gets read_dir, lookup and few others to work. Entries cannot
be listed yet except the root.

Change-Id: Ic4b7b61a794a1b75849e45777a383b3315b15aa8
Reviewed-on: https://review.haiku-os.org/c/haiku/+/2915
Reviewed-by: Adrien Destugues <pulkomandy@gmail.com>