fix / CLOUD-25855 / exports

[oli-hivemq]

Why

Exports were changed in v0.4.1 and it's breaking the build of other projects trying to import components, colors, fonts or styles.
e.g.

import { colors, components, styles, fonts } from '@hivemq/ui-theme'

What

• export theme as default
• re-export components, colors, fonts and styles
• also export semanticTokens

Todos

• I have added a description to this pull request that describes the changes in detail
• I have performed a self-review of my code
• I have added a label that describes the PR type (bug, enhancement, ci, refactor, documentation, test, chore)
• I have updated the optional PR title to follow the pattern Fix / TICKET_ID / DESCRIPTION (e.g. Fix / 123456 / Fixing the login button)
• I have run manual tests to check if everything is functional
• I have added screenshots/videos that explain my graphical changes

Screenshots