ino-snackbar: make icon interchangeable

[janivo]

Description

Currently, our <ino-snackbar> component displays a static icon based on the snackbar type. There is a requirement to make these icons configurable to allow for customization, especially when conveying meta information (e.g., displaying a lock icon for privacy notifications).

Motivation

Enabling configurability for icons in the <ino-snackbar> component enhances its customization capabilities, allowing developers to tailor the visual representation based on specific use cases.

Acceptance Criteria

• Allow developers to easily swap out the default icons with custom icons, providing flexibility for different use cases.
• Ensure the default icons are retained if no configuration is provided.
• Provide examples and usage instructions for developers to implement custom icons.