Add Mastery Status Count stacked bar chart to the Competency dashboard

User Story

As a course team member, I want to see the number of learners interacting with the skills on my platform and whether or not those learners have mastered those skills, so that I can analyze how learners are doing with assessments for each and what skills they are interacting with the most and least.

Acceptance Criteria

Description: A Mastery Status Count stacked bar chart has been added to the Mastery Status Snapshot section of the Competency Dashboard.
Given I am a user with access to the Competency Dashboard
When I view the Mastery Status Snapshot section
Then I see a stacked bar chart titled Mastery Status Count that shows, for each currently filtered Competency (X-axis), the number of learners who have Not Started, Partially Attempted, Attempted Not Demonstrated, or Demonstrated that competency (Y-axis).

And I can select one or more status (example: Attempted Not Demonstrated, Partially Attempted)
And have the chart update to only show counts for those statuses for example

Start by locating the Competency Dashboard and its Mastery Status Snapshot section; the payload does not name files or tests. The work is done when a Mastery Status Count stacked bar chart shows the four learner statuses for each filtered competency and updates when one or more statuses are selected.