feat: sd-badge variant names a11y update

[smfonseca]

User Story

Problem: In the docs, it says that the success and error variants don't imply any semantic meaning. They kinda do because they tell me that something good, bad, or neutral is going on. You can argue that the number itself is enough to communicate that information, at least as a fallback, but that's not the case in the sm variation. It only communicates the state visually.

Solution:

• Extend the hint to make clear why we have the variant names
•  Change variants names from to blue, red and green to avoid connotations

Discussion regarding this change can be found here.

DoR

• Item has business value
• Item all subtasks have been estimated by the team
• Item is clear and well-defined
• Item dependencies have been identified

DoD

• All subtasks have been closed