Make it possible to use the phase banner without a phase tag

[36degrees]

What

Make it possible to use the phase banner macro without a phase tag by:

• not outputting an empty tag when no tag is passed
• marking the tag option as not required in the macro options
• adding an example
• adding tests to cover this behaviour
• ensuring we're happy with the design and layout of the phase banner when no tag is included

Why

We're seeing examples of this in live services:

It's a bit strange given that this component is called a phase banner, and there are questions about whether the phase banner is the right place to ask for feedback, but this is an easy change to match how the component is being used in some places.

Adding an example of this also means we'll consider this use case when making changes to the component, avoiding accidental breaking changes for instances where there is no phase tag being used.

Because we're not sure this is the right place to ask for feedback, I suggest we don't add guidance or examples to the Design System for now.

Who needs to work on this

Developers, designer

Who needs to review this

Developers, designer

Done when

• The phase banner can be used without a phase tag
• We have an example and tests to cover this behaviour