move MicroPython and dashboards -> tutorials

tutorials/http/device-dashboard/README.md

@@ -0,0 +1,13 @@
+# A complete device dashboard
+
+This example is a demonstration of how Mongoose Library could be integrated
+into an embedded device and provide a complete device dashboard with the
+following features:
+
+- Authentication: login-protected dashboard
+- Multiple logins (with possibly different permissions)
+- The Web UI can be fully embedded into the firmware binary, then not
+  needing a filesystem to serve it; so being resilient to FS problems
+- All changes are propagated to all connected clients
+
+See a detailed tutorial at https://mongoose.ws/tutorials/device-dashboard/