build: output into "build" folder again → "dist" will be used for the final output in archive form

this will allow for cleaner separation -> build for the output from the build stage (i.e. TS/Webpack + asset copying) and dist for the archive format of the build folder

bin/copy-dist.ts

@@ -1,7 +1,7 @@
 import fs from "fs-extra";
 import path from "path";
 
-const DEST_DIR = "./dist";
+const DEST_DIR = "./build";
 
 const VERBOSE = process.env.VERBOSE;