Move TypeScript Node.js build to dist/node

Use a separate folder for the TypeScript build for Node.js in the dist
folder.  This makes each type of build consistently have its own output
folder instead of being interleaved with the Node.js build.

test/controller/HttpCloser.js

@@ -7,7 +7,7 @@ const util = require("util");
 
 const phin = require("phin");
 
-const HttpCloser = require("@clusterio/controller/dist/src/HttpCloser").default;
+const HttpCloser = require("@clusterio/controller/dist/node/src/HttpCloser").default;
 
 // Time to wait during async operations to ensure they happened in order.
 const tick = 20;