Move espruinotools.js to lib as it seems a more sensible location

.eslintignore

@@ -1,4 +1,4 @@
-js/espruinotools.js
+lib/espruinotools.js
 lib/imageconverter.js
 lib/qrcode.min.js
 lib/heatshrink.js

index.html

@@ -179,7 +179,7 @@
     <script src="js/comms.js"></script>
     <script src="js/appinfo.js"></script>
     <script src="js/index.js"></script>
-    <script src="js/espruinotools.js"></script>
+    <script src="lib/espruinotools.js"></script>
     <script src="lib/heatshrink.js"></script>
     <script src="https://cdn.jsdelivr.net/npm/marked/marked.min.js"></script>
     <script src="js/pwa.js" defer></script>