class Contact add function avatarUrl

[VEADoc]

Signed-off-by: VEADoc 690880212@qq.com

I'm submitting a...

[ ] Bug Fix
[*] Feature
[ ] Other (Refactoring, Added tests, Documentation, ...)

Checklist

• Commit Messages follow the Conventional Commits pattern
  • A feature commit message is prefixed "feat:"
  • A bugfix commit message is prefixed "fix:"
• Tests for the changes have been added

Description

please describe the changes that you are making

for features, please describe how to use the new feature
const avatarUrl = contact.avatarUrl()
please include a reference to an existing issue, if applicable
#1918

Does this PR introduce a breaking change?

[ ] Yes
[*] No

[claassistantio]

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