Critter access policy and small fixes

[RustyBraze]

Before deploy

Do not forget to run bin/migrate and to check the config file config.default.php. New policy variables inside:

    // Policy features
    'policy'                => [
        // Adds the prefix to the visual text but do not affect the link
        'telegram_visual_prefix' => '', //keep it empty - users without telegram, may be buggy
        // Non-staff others profile link generation - False = empty link / True = message
        'non_staff_message_shortcut' => true,
        // Non-Staff - Use Telegram for message. False > uses internal message system
        'non_staff_message_via_telegram' => true,
    ],

[Add]

• New awesome theme add/created by @balenty
• New policy flag telegram_visual_prefix
  • Only the text displayed gets the prefix while not touching the link. For example, we can add '@'
• Force remove @ from the telegram handler when rendering link - from the database (old data)
• New policy flag non_staff_message_shortcut
  • Responsible for profile link generation for all critters - affects viewing others profiles
  • True (Default) = Create a link to send internal message to the target user
  • False = Disable the link creation - Just shows the name... no link
• Privilege Group: Staff - Internal
• Privilege: user.type.internal_staff for internal staff
• Migration script for the new Privilege Internal Staff
  • Add group and privilege
  • Add the new privilege to groups: Bureaucrat, Developer, Shift Coordinator
• New config policy: non_staff_message_via_telegram False = Use internal message system / True = Use telegram (if exist)
• Proper description for the function render_profile_link

[Change]

• Fix: Wrong profile link when departure date is missing
• Fix: config variable telegram_visual_prefix set to empty
• Guest - can't see contacts
• Non staff - profile (others) access is restricted
• Other small stuff not relevant to be documented
• New parameter for function render_profile_link -> yes, not ideal but later to be improved
• If telegram handler is available, it will be used, if not, default to internal message system
• Add explicit variables declaration for the function render_user_departure_date_hint and User_Nick_render