VAPI 1094 Media Streaming api (#625)

Add documentation for Programmable Voice Media Streaming Feature

Co-authored-by: Catherine <[email protected]>
Co-authored-by: Marcelo Hossomi <[email protected]>
Co-authored-by: Nick Ashley <[email protected]>

Author: 4 people

site/docs/voice/bxml/about.mdx

@@ -76,6 +76,8 @@ If BXML execution ends without performing a webhook, there is an implicit `<Hang
 | [`<Gather>`](/docs/voice/bxml/gather)                   | The Gather verb is used to collect DTMF digits.                                                       |
 | [`<StartGather>`](/docs/voice/bxml/startGather)         | The StartGather verb is used to collect DTMF digits during the execution of other verbs.              |
 | [`<StopGather>`](/docs/voice/bxml/stopGather)           | The StopGather verb stops the DTMF collection initiated by `<StartGather>`.                           |
+| [`<StartStream>`](/docs/voice/bxml/startStream)         | The StartStream verb allows a segment of a call to be streamed to an external destination.            |
+| [`<StopStream>`](/docs/voice/bxml/stopStream)           | The StopStream verb is used to stop a stream previously started by a `<StartStream>` verb.            |
 | [`<SendDtmf>`](/docs/voice/bxml/sendDtmf)               | The SendDtmf verb is used to play DTMF digits in the call.                                            |
 | [`<Tag>`](/docs/voice/bxml/tag)                         | The Tag verb is used to set a new tag value without executing a webhook.                              |
 
@@ -106,6 +108,9 @@ BXML webhooks are HTTP messages that are sent to your application server to noti
 | [Conference Recording Available](/docs/voice/webhooks/conferenceRecordingAvailable) | Bandwidth API sends this when a recording started by a `<StartRecording>`in a conference is available for download. |
 | [Disconnect](/docs/voice/webhooks/disconnect)                          | Bandwidth API sends this when a call ends. |
 | [DTMF](/docs/voice/webhooks/dtmf)                                      | Bandwidth API sends this for every digit detected after a `<StartGather>` is executed. |
+| [MediaStreamStarted](/docs/voice/webhooks/mediaStreamStarted)          | Bandwidth API sends this after the stream requested in a `<StartStream>` is started. |
+| [MediaStreamRejected](/docs/voice/webhooks/mediaStreamRejected)        | Bandwidth API sends this if a stream requested in a `<StartStream>` can not be started. |
+| [MediaStreamStopped](/docs/voice/webhooks/mediaStreamStopped)          | Bandwidth API sends this when a stream requested in a `<StartStream>` ends. |
 | [Recording Available](/docs/voice/webhooks/recordingAvailable)         | Bandwidth API sends this when a recording started by either a `<StartRecording>` or a `<Record>` verb in a call is available for download. |
 | [Transfer Disconnect](/docs/voice/webhooks/transferDisconnect)         | Bandwidth API sends this when any leg of a `<Transfer>` ends.                                                                    |
 | [Transcription Available](/docs/voice/webhooks/transcriptionAvailable) | Bandwidth API sends this when the transcription of a recording is available for download.                                        |