* feat(settings): introduce a setting to prevent non-admin from stack creation
* feat(settings): update stack creation setting
* feat(settings): fail stack creation if user is non admin
* fix(settings): save preventStackCreation setting to state
* feat(stacks): disable add button when settings is enabled
* format(stacks): remove line
* feat(stacks): setting to hide stacks from users
* feat(settings): rename disable stacks setting
* refactor(settings): rename setting to disableStackManagementForRegularUsers
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