Added local echo conversation component (#4587)

* Added local echo conversation component

Signed-off-by: Whit Waldo <whit.waldo@innovian.net>

* Update daprdocs/content/en/reference/components-reference/supported-conversation/local-echo.md

Co-authored-by: Alice Gibbons <alicejgibbons@gmail.com>
Signed-off-by: Whit Waldo <whit.waldo@innovian.net>

* Update local-echo.md

Fixed repeated text

Signed-off-by: Mark Fussell <markfussell@gmail.com>

* Update generic.yaml

Marking Echo stable, since it is only used for local testing

Signed-off-by: Mark Fussell <markfussell@gmail.com>

---------

Signed-off-by: Whit Waldo <whit.waldo@innovian.net>
Signed-off-by: Mark Fussell <markfussell@gmail.com>
Co-authored-by: Alice Gibbons <alicejgibbons@gmail.com>
Co-authored-by: Mark Fussell <markfussell@gmail.com>

daprdocs/content/en/reference/components-reference/supported-conversation/local-echo.md

@@ -0,0 +1,28 @@
+---
+type: docs
+title: "Local Testing"
+linkTitle: "Echo"
+description: Detailed information on the echo conversation component used for local testing
+---
+
+## Component format
+
+A Dapr `conversation.yaml` component file has the following structure:
+
+```yaml
+apiVersion: dapr.io/v1alpha1
+kind: Component
+metadata:
+  name: echo
+spec:
+  type: conversation.echo
+  version: v1
+```
+
+{{% alert title="Information" color="warning" %}}
+This component is only meant for local validation and testing of a Conversation component implementation. It does not actually send the data to any LLM but rather echos the input back directly.
+{{% /alert %}}
+
+## Related links
+
+- [Conversation API overview]({{< ref conversation-overview.md >}})

daprdocs/data/components/conversation/generic.yaml

@@ -23,3 +23,8 @@
   state: Alpha
   version: v1
   since: "1.15"
+- component: Local echo
+  link: local-echo
+  state: Stable
+  version: v1
+  since: "1.15"