Describe the bug
Currently alr printenv does not support output in the Msys path convention, i.e. in the form like /e/alire/gprbuild_22.0.1_c842bbc5/bin:/e/alire/gnat_arm_elf_14.2.1_2c52e01a/bin:... instead of the current form e:\alire\gprbuild_22.0.1_c842bbc5\bin;e:\alire\gnat_arm_elf_14.2.1_2c52e01a\bin;...

To Reproduce
run alr printenv --unix in a Msys2 environment (mingw/ucrt64)

Expected Behavior
alr printenv --msys should print

export PATH="/e//alire/gprbuild_22.0.1_c842bbc5/bin:/e/alire/gnat_arm_elf_14.2.1_2c52e01a/bin:..."

alr version

$ alr version
APPLICATION
alr version:               2.0.1
libalire version:          2.0.1
compilation date:          2024-03-21 11:09:31
compiled with version:     13.2.0

CONFIGURATION
settings folder:           C:\Users\Rolf\AppData\Local\alire\settings
cache folder:              e:\alire
vault folder:              e:\alire\releases
build folder:              e:\alire\builds
temp folder:               E:\msys64\tmp
force flag:                FALSE
non-interactive flag:      FALSE
community index branch:    stable-1.3.0
compatible index versions: ^1.1 & <=1.3.0
indexes folder:            C:\Users\Rolf\AppData\Local\alire\settings\indexes
indexes metadata:          OK
index #1:                  (community) git+https://github.com/alire-project/alire-index#stable-1.3.0
toolchain folder:          e:\alire
toolchain assistant:       disabled
tool #1 gnat:              gnat_native=14.2.1
tool #2 gprbuild:          gprbuild=22.0.1
system package manager:    E:\msys64\usr\bin\pacman.exe
distro detection disabled: FALSE

WORKSPACE
root status:               VALID
root release:              hello=0.1.0-dev
root load error:           none
root folder:               H:\Ada\rp2040\hello
current folder:            H:\Ada\rp2040\hello

SYSTEM
distribution:              MSYS2
host-arch:                 X86_64
os:                        WINDOWS
target:                    NATIVE
toolchain:                 USER
word-size:                 BITS_64