[IMP] app, compiler: introduce t-out

t-out automatically escaped content when it is a string not marked
with the `markup` function

t-out renders the raw content if it is a Block, or if it has been marked
with the `markup` funtion.

t-esc has been kept since it is safe and is optimized to render text nodes.

all t-raw calls are in fact the same as t-out.

src/index.ts

@@ -11,7 +11,6 @@ import {
   toggler,
 } from "./blockdom";
 import { mainEventHandler } from "./component/handler";
-import { EventBus, whenReady, loadFile } from "./utils";
 
 config.shouldNormalizeDom = false;
 config.mainEventHandler = mainEventHandler;
@@ -58,7 +57,7 @@ export { Memo } from "./misc/memo";
 export { css, xml } from "./tags";
 export { useState } from "./reactivity";
 export { useEffect, useEnv, useExternalListener, useRef, useSubEnv } from "./hooks";
-export const utils = { EventBus, whenReady, loadFile };
+export { EventBus, whenReady, loadFile, markup } from "./utils";
 
 export {
   onWillStart,