Add build via esbuild

This configures the existing build tasks to use esbuild by default. If
using the plain files is desired, passing `--bundle=false` will build
using plain files and still produce a runnable system.

This is only a basic build; a more efficient build is provided later
when gulp is replaced by hereby.

src/executeCommandLine/tsconfig.json

@@ -1,7 +1,6 @@
 {
     "extends": "../tsconfig-base",
     "compilerOptions": {
-        "outDir": "../../built/local/executeCommandLine"
     },
 
     "references": [