adds file based routing w server rendered custom elements
app
├── api ............... file based routing for rendering json, or populating initial page state
├── elements .......... define pure functions that return custom elements
└── pages ............. file based routing for rendering html
└── index.html
file based routing using leading $ for dynamic parameters reasoning
$is safe on windows and linux UNLESS its trailing in which case thats a hidden file in windows:is illegal in windows file paths*will expand in various system shells creating ambiguity.is meaningful in system shells (current dir) and completions with..and/or...creates ambiguity