Messaging namespace with new interface

[iAmmar7]

Description

The new interface for the Messaging API.

ref: https://github.com/signalwire/cloud-product/issues/7027

Type of change

• Internal refactoring
• Bug fix (bugfix - non-breaking)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)

Code snippets

    const client = await SignalWire({
      host: process.env.HOST || 'relay.swire.io',
      project: process.env.PROJECT as string,
      token: process.env.TOKEN as string,
    })

    const unsubOfficeListener = await client.messaging.listen({
      topics: ['office'],
      onMessageReceived: (payload) => {
        console.log('Message received under "office" context', payload)
      },
      onMessageUpdated: (payload) => {
        console.log('Message updated under "office" context', payload)
      },
    })

    try {
      const response = await client.messaging.send({
        from: process.env.FROM_NUMBER_MSG as string,
        to: process.env.TO_NUMBER_MSG as string,
        body: 'Hello World!',
        context: 'office',
      })

      await client.messaging.send({
        from: process.env.FROM_NUMBER_MSG as string,
        to: process.env.TO_NUMBER_MSG as string,
        body: 'Hello John Doe!',
      })
    } catch (error) {
      console.log('>> send error', error)
    }

[changeset-bot]

🦋 Changeset detected

Latest commit: 48e47c5

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 6 packages

Name	Type
@signalwire/realtime-api	Major
@signalwire/core	Major
@signalwire/node	Patch
@signalwire/js	Patch
@signalwire/web-api	Patch
@signalwire/webrtc	Patch

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Click here if you're a maintainer who wants to add another changeset to this PR

[iAmmar7]

This PR is dependent on the Voice interface PR. We need to merge that one before we merge this one.

[edolix]

LGTM!