Minimal implementation of KToolbar.

[rtibbles]

Description

• Moves UiToolbar from the keen dir and makes minimal edits to turn it into KToolbar
• Also integrates the styling that is always applied in Kolibri itself in the wrapped kolibri-common/components/UiToolbar component

Changelog

• Description: Creates the initial KToolbar component as a direct port of UiToolbar
• Products impact: new API, removed API - adds KToolbar, removes UiToolbar from the keen dir
• Addresses: N/A
• Components: UiToolbar, KToolbar
• Breaking: yes
• Impacts a11y: no
• Guidance: Creates initial KToolbar component as a port of UiToolbar. Further changes and iterations to API expected.

Steps to test

1. Step 1
2. Step 2
3. ...

(optional) Implementation notes

At a high level, how did you implement this?

Does this introduce any tech-debt items?

Testing checklist

• Contributor has fully tested the PR manually
• If there are any front-end changes, before/after screenshots are included
• Critical and brittle code paths are covered by unit tests
• The change is described in the changelog section above

Reviewer guidance

• Is the code clean and well-commented?
• Are there tests for this change?
• Are all UI components LTR and RTL compliant (if applicable)?
• Add other things to check for here

Comments