[Documentation]: Split ngx-inform introduction page into two sections

[IbenTesara]

The ngx-inform page needs to be divided into a For business and a For developers section.

• In the For business section, we explain that the inform package is used for common use-cases where an end-user needs to be informed by the application (tooltip, modal, etc.) in a fully WCAG compliant way.
• In the For developers section we use the existing documentation