Code Insights: Extract view (visual) component for the insight and insight like extensions

Created by: vovakulikov

Preparation for https://github.com/sourcegraph/sourcegraph/issues/24201

Context

Before this PR insights directory contained some visual components for rendering some extensions like views such as charts or markdown. The usage of these components blocks us from moving the insights directory to the enterprise since we have a few places in the app where we use some of these components to render non-insight related data.

This PR extracts view (non-insight directly related components) to the separate directory - ./views.