AM-66 : List of stable addons displays all available versions for each addon

AM_LIST_01 - addon list
list each add-on of the catalog which have at least 1 stable version
for each add-on, display *only the last* stable version
for each listed Add-on, never display the development and unstable versions
don't list add-ons which contains only development or unstable versions

AM_LIST_02 - addon list  --snapshots
list add-ons that have stable or development versions
for each add-on, display the last stable and the last development version

AM_LIST_03 - addon list --unstable
list add-ons that have stable or unstable versions
for each add-on, display the last stable and the last unstable version