Collector documentation (#113)

* Initial draft of collector documentation

* Add docs for all collectors

* Update main README with links to docs

* Fix link syntax

docs/collector.netframework_clrremoting.md

@@ -0,0 +1,31 @@
+# netframework_clrremoting collector
+
+The netframework_clrremoting collector exposes metrics about dotnet remoting.
+
+Metric name prefix | `netframework_clrremoting`
+Classes             | `Win32_PerfRawData_NETFramework_NETCLRRemoting`
+Enabled by default? | No
+
+## Flags
+
+None
+
+## Metrics
+
+Name | Description | Type | Labels
+-----|-------------|------|-------
+`wmi_netframework_clrremoting_channels_total` | Displays the total number of remoting channels registered across all application domains since application started. | counter | `process`
+`wmi_netframework_clrremoting_context_bound_classes_loaded` | Displays the current number of context-bound classes that are loaded. | gauge | `process`
+`wmi_netframework_clrremoting_context_bound_objects_total` | Displays the total number of context-bound objects allocated. | counter | `process`
+`wmi_netframework_clrremoting_context_proxies_total` | Displays the total number of remoting proxy objects in this process since it started. | counter | `process`
+`wmi_netframework_clrremoting_contexts` | Displays the current number of remoting contexts in the application. | gauge | `process`
+`wmi_netframework_clrremoting_remote_calls_total` | Displays the total number of remote procedure calls invoked since the application started. | counter | `process`
+
+### Example metric
+_This collector does not yet have explained examples, we would appreciate your help adding them!_
+
+## Useful queries
+_This collector does not yet have any useful queries added, we would appreciate your help adding them!_
+
+## Alerting examples
+_This collector does not yet have alerting examples, we would appreciate your help adding them!_