fix: search as string literal from editor extensions
Created by: KattMingMing
Updates the editor extension search action to search as a string literal.
Prior to this fix a selecting the following text inside a file and using the search shortcut from the editor would throw
error parsing regexp: missing closing ): `.getFile(`
Also fixes the case where a search query contained a literal string and the quotes were not properly escaped.
This PR updates the CHANGELOG.md file to describe any user-facing changes.