feat: render cta for unsupported content (#2663)

detect and display custom message for unsupported content
add a targetUrl for the unsupported content
set the message signals for unsupported content
set the unsupported content component in Chat

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Signed-off-by: Musale Martin <[email protected]>
Signed-off-by: Martin Musale <[email protected]>
Co-authored-by: Gavin Barron <[email protected]>

Author: musale