feat(xmpp): pass all user identity fields from JWT context

[mihhu]

Extract all fields from <identity><user> presence node instead of filtering to only specific fields (id, name, avatar). This allows custom JWT context.user fields to propagate through to the application.

Description

• Modified extractIdentityInformation to iterate all user children
• Maintained conditional logic for hidden-from-recorder field

Related Issue

Not an issue, just giving possibility to access full JWT context for API events such as PARTICIPANT_JOINED.

Motivation and Context

See above.

How Has This Been Tested?

Symlink with jitsi-meet iframe.

Screenshots or GIF (In case of UI changes):

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)

Checklist:

• My code follows the code style of this project.
• My change requires a change to the documentation.
• I have updated the documentation accordingly.
• I have added tests to cover my changes.
• All new and existing tests passed.

[jitsi-jenkins]

Hi, thanks for your contribution!
If you haven't already done so, could you please make sure you sign our CLA (https://jitsi.org/icla for individuals and https://jitsi.org/ccla for corporations)? We would unfortunately be unable to merge your patch unless we have that piece :(.