deprecate dialogflow guides (#538)

Author: Devon-White

website/docs/main/home/platform/integrations/dialogflow/_deprecated.mdx

@@ -0,0 +1,9 @@
+:::warning Deprecation Notice
+The Dialogflow integration with SignalWire has been deprecated and is no longer actively supported.
+
+**What this means:**
+- Existing Dialogflow applications will continue to function normally
+- New Dialogflow integrations cannot be created
+- We recommend migrating to alternative AI solutions for new projects
+
+:::

website/docs/main/home/platform/integrations/dialogflow/dialogflow-agents/index.mdx

@@ -9,8 +9,13 @@ x-custom:
   last_reviewed_by: danieleds
 ---
 
+import DeprecationWarning from "../_deprecated.mdx"
+
+
 # Integrating with Dialogflow Agents
 
+<DeprecationWarning />
+
 Dialogflow agents allow you to use and build engaging, conversational interfaces
 powered by Google's Dialogflow AI. You can import Dialogflow agents in your
 [SignalWire Space](https://signalwire.com/signin) and connect them to your

website/docs/main/home/platform/integrations/dialogflow/dialogflow-using-nodejs-to-get-caller-id-send-sms.mdx

@@ -7,6 +7,11 @@ x-custom:
   ported_from_readme: true
 ---
 
+import DeprecationWarning from "./_deprecated.mdx"
+
+
+<DeprecationWarning />
+
 Generally, DialogFlow is not an SMS interactive platform, but it is more designed for accepting incoming audio, and making machine learning decisions based on audio input.
 
 However, DialogFlow can interact with NodeJS, and therefore can utilize SignalWire’s NodeJS libraries. DialogFlow is able to send outbound GET/POST requests, but in order to enable this, a credit card must be on file in the DialogFlow account (the pay-as-you-go plan is a good option)

website/docs/main/home/platform/integrations/dialogflow/index.mdx

@@ -3,6 +3,11 @@ title: Dialogflow Integration
 slug: /platform/integrations/dialogflow
 ---
 
+import DeprecationWarning from "./_deprecated.mdx"
+
+
+<DeprecationWarning />
+
 This section contains guides for using Dialogflow with SignalWire.
 
 <DocCardList />