Edge Code is a lightweight code editor. It can edit any kind of HTML/JS/CSS file just like Dreamweaver can but it doesn't have the same feature set as Dreamweaver. It's targeted specifically at edting web code as opposed to generating any.
And yes, you can definitely use Edge Code to edit Animate projects. Instead of opening the _edge.js file you just need to open the default .html file from Animate. Then you can use Live Preview.