feat: support phone templates

[kushalshit27]

🔧 Changes

• Add phone template support in the Auth0 Deploy CLI
• Document the new resource with YAML and directory examples and seed sample configs in examples/.

Examples

YAML format

phoneTemplates:
  - type: "otp_verify"
    disabled: false
    content:
      from: "+12341234567"
      body:
        text: "Your verification code is {{ code }}"
        voice: "Your verification code is {{ code }}"

JSON format

{
  "type": "otp_verify",
  "disabled": false,
  "content": {
    "from": "+12341234567",
    "body": {
      "text": "Your verification code is {{ code }}",
      "voice": "Your verification code is {{ code }}"
    }
  }
}

📚 References

• Create phone template
• Get phone template
• Update phone template
• Delete phone template

🔬 Testing

• Unit test added
• E2E - TODO

📝 Checklist

• All new/changed/fixed functionality is covered by tests (or N/A)
• I have added documentation for all new/changed functionality (or N/A)

[palashgdev]

@kushalshit27 There are some small type fixes only, other than this it looks fine to me