Add edit functionality via creation UI for code insight
Created by: vovakulikov
Closes: https://github.com/sourcegraph/sourcegraph/issues/20202
This PR is a second PR of edit/delete story
Since we adopted creation UI for code insight we want to replace all cases when a user has to go to user setting editor with actually Creation UI.
Edit is another function that fits in insights creation UI. Now we have edit action in a context menu for insight. If user clicks on that action he will be redirected to/insights/edit/:insightID
page which is actually a creation UI page with prefilled data
You can find Figma designs about this functionality here