move examples

Author: Andrew Xue

docs/examples/cloud_monitoring/README.rst

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+Cloud Trace Exporter Example
+============================
+
+These examples show how to use OpenTelemetry to send tracing data to Cloud Trace.
+
+
+Basic Example
+-------------
+
+To use this exporter you first need to:
+    * A Google Cloud project. You can `create one here. <https://console.cloud.google.com/projectcreate>`_
+    * Enable Cloud Monitoring API (aka StackDriver Monitoring API) in the project `here. <https://console.cloud.google.com/apis/library?q=cloud_monitoring>`_
+    * Enable `Default Application Credentials. <https://developers.google.com/identity/protocols/application-default-credentials>`_
+
+* Installation
+
+.. code-block:: sh
+
+    pip install opentelemetry-api
+    pip install opentelemetry-sdk
+    pip install opentelemetry-ext-cloud-monitoring
+
+* Run example
+
+.. code-block:: sh
+
+    python basic_metrics.py
+
+Checking Output
+--------------------------
+
+After running any of these examples, to see the results
+    * Go to `Cloud Monitoring overview <https://console.cloud.google.com/monitoring/metrics-explorer>`_ to see the results.
+    * In "Find resource type and metric" enter "OpenTelemetry/<your_metric_name"
+    * You can filter by labels and change the graphical output here as well