feat: xflow integration

[Merculiar]

Changes

Xflow integration:

• Email verification
• Phone verification
• KYC
• Orders

Checklist

• [x] PR is ready for review (if not, it should be a draft).
• [x] PR title follows Conventional Commits guidelines.
• [ ] Screenshots/video added.
• [ ] Tests added.
• [x] Self-review done.

[ookami-kb]

@Merculiar please resolve conflicts

[Merculiar]

@ookami-kb resolved