[processor/elastictrace] Bump stability to alpha and add README (#174)

Author: lahsivjar

processor/elastictraceprocessor/README.md

@@ -0,0 +1,23 @@
+# Elastic trace processor
+
+<!-- status autogenerated section -->
+| Status        |           |
+| ------------- |-----------|
+| Stability     | [alpha]: traces   |
+| Distributions | [] |
+| Issues        | [![Open issues](https://img.shields.io/github/issues-search/open-telemetry/opentelemetry-collector-contrib?query=is%3Aissue%20is%3Aopen%20label%3Aprocessor%2Felastictrace%20&label=open&color=orange&logo=opentelemetry)](https://github.com/open-telemetry/opentelemetry-collector-contrib/issues?q=is%3Aopen+is%3Aissue+label%3Aprocessor%2Felastictrace) [![Closed issues](https://img.shields.io/github/issues-search/open-telemetry/opentelemetry-collector-contrib?query=is%3Aissue%20is%3Aclosed%20label%3Aprocessor%2Felastictrace%20&label=closed&color=blue&logo=opentelemetry)](https://github.com/open-telemetry/opentelemetry-collector-contrib/issues?q=is%3Aclosed+is%3Aissue+label%3Aprocessor%2Felastictrace) |
+
+[alpha]: https://github.com/open-telemetry/opentelemetry-collector#alpha
+<!-- end autogenerated section -->
+
+The processor enriches traces with elastic specific requirements. It uses [opentelemetry-lib](https://github.com/elastic/opentelemetry-lib/) to perform the actual enrichments.
+
+
+## Configuration
+
+### Enable all enrichments
+
+```yaml
+processors:
+  elastictrace:
+```

processor/elastictraceprocessor/internal/metadata/generated_status.go

@@ -4,5 +4,5 @@ scope_name: github.com/elastic/opentelemetry-collector-components/processor/elas
 status:
   class: processor
   stability:
-    development: [traces]
+    alpha: [traces]
   distributions: []