Create react components stub for message card Channels part

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See message card examples at

• Обзор Marka. Возможно, именно та самая альтернатива Controller bot для
• https://marka.io

Create two tabs into bot scheme page

• constructor
• broadcasting

on default should be opened constructor tab

in bot scheme page separate window on three column tabs | button + and list messages | message configuration

when '+' clicked then in third column should be visible message card and under + should be appear new list item

so this will be look as

+
new message 1
new message 2
new message 3
new message 4

broadcasting tab: message card + timer constructor tab: message card

in more formally - in future message card it's equivalent https://dev.tamtam.chat/#operation/sendMessage

Builder Pattern maybe will be helpful.

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