Resolve "TYPO3 to 8.7.24"

Closes #269

See merge request !123

# Conflicts:
#   composer.lock

Resolve "Update femanager to 4.2.4"

Closes #268

See merge request !122

Restructure project

Closes #2, #6, and t3o_ldap#7

See merge request !120

git-subtree-dir: extensions/t3o_ldap
git-subtree-mainline: c37ac5ef
git-subtree-split: dbaaae85

Resolve "Recover process must set default group"

Closes #227

See merge request !118

Resolve "Reactivate user process via backend"

Closes #210

See merge request !110

Resolve "Create 404 page"

Closes #211

See merge request !116

Page with id 404 must exist, in order that this is working

Resolve "Create karma extension shell"

Closes #205

See merge request !105

Resolve "Reactivate user process issue template"

Closes #207

See merge request !112

[TASK] activating 404 error handling

Closes #168

See merge request !111

Resolve "Change error message if username is blocked"

Closes #177

See merge request !108