fastreset: add new app 'Fast Reset'

add app 'Fast Reset' (boot code)

use the more descriptive `Bangle.showClock` instead of `load(".bootcde")`

fix scope of buzzTimeout id variable

compact the code a little bit

change metadata and readme to reflect a shortened timeout

apps/fastreset/ChangeLog

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+0.01: New App!

apps/fastreset/README.md

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+# Fast Reset
+
+Reset the watch by holding the hardware button for half a second. If 'Fastload Utils' is installed this will typically be done with fastloading. A buzz acts as indicator.
+
+Fast Reset was developed with the app history feature of 'Fastload Utils' in mind. If many apps are in the history stack, the user may want a fast way to exit directly to the clock face without using the firmwares reset function.
+
+## Usage
+
+Just install and it will run as boot code.
+
+## Features
+
+If 'Fastload Utils' is installed fastloading will be used when possible. Otherwise a standard `load(.bootcde)` is used.
+
+If the hardware button is held for longer the standard reset functionality of the firmware is executed as well (total 1.5 seconds). And eventually the watchdog will be kicked.
+
+## Controls
+
+Hold the hardware button for half a second to feel the buzz, loading the clock face.
+
+## Requests
+
+Mention @[thyttan](https://github.com/thyttan) in an issue to the official [BangleApps repository](https://github.com/espruino/BangleApps/issues) for feature requests and bug reports.
+
+## Acknowledgements
+
+<a target="_blank" href="https://icons8.com/icon/15165/rewind">Rewind</a> icon by <a target="_blank" href="https://icons8.com">Icons8</a>
+
+## Creator
+
+[thyttan](https://github.com/thyttan)
+

apps/fastreset/boot.js

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+{let buzzTimeout;
+setWatch((e)=>{  
+  if (e.state) buzzTimeout = setTimeout(()=>{Bangle.buzz(80,0.40);Bangle.showClock();}, 500);
+  if (!e.state && buzzTimeout) clearTimeout(buzzTimeout);},
+BTN,{repeat:true, edge:'both' });}

apps/fastreset/metadata.json

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+{ "id": "fastreset",
+  "name": "Fast Reset",
+  "shortName":"Fast Reset",
+  "version":"0.01",
+  "description": "Reset the watch by holding the hardware button for half a second. If 'Fastload Utils' is installed this will typically be done with fastloading. A buzz acts as indicator.",
+  "icon": "app.png",
+  "type": "bootloader",
+  "tags": "system",
+  "supports" : ["BANGLEJS2"],  
+  "readme": "README.md",
+  "storage": [
+    {"name":"fastreset.boot.js","url":"boot.js"}
+  ]
+}