Add pages to core/frontend

[MarcTroll]

The following pages to be added to the core:

• dashboard/home
• search
• imprint
• privacy policy
• login
• registration
• user/list users
• user/user profile
• user/list team
• moderation/list moderation-reports
• moderation/view moderation-report
• conversation/add conversation
• conversation/list conversations
• conversations/view conversation
• account/list blocked users
• account/list following user
• account/manage account (e.g. password, email, username, ...)
• account/show user profile
• account/manage settings