feat!: removes btjs and adds device info header

[ddiestra]

Description

• Remove Basis Theory JS and include Device Info Header

Testing required outside of automated testing?

• Not Applicable

Screenshots (if appropriate):

• Not Applicable

Rollback / Rollforward Procedure

• Roll Forward
• Roll Back

Reviewer Checklist

• Description of Change
• Description of outside testing if applicable.
• Description of Roll Forward / Backward Procedure
• Documentation updated for Change