Module cleanup discussion - 2023

Goal: Identify unmaintained sling modules and mark them accordingly (by moving them into attic), so it's clearer which modules require active maintenance (for example deactivate the renovate-bot for all modules in attic and reduce noise).

Approach: Use the last commit into the src directory as initial criteria to come up with a list of candidates, then refine it.

• Actively used  modules (for which no change was required in the last years) will remain active (e.g. they are referenced by other Sling modules)
• Modules for which a committer or community member shows interest will remain active.

(Note: The decision to move a module into attic can be reversed at any time, if the necessity arises.)

Data extracted via: find ./* -maxdepth 0 -type d | while read a; do (cd $a; test -d src && echo -n "$a," &&    git log --date=format:%Y -1 -- src -- | grep Date); done | grep 201 | sort -t ' ' -k 2 -n