feat: Design PayTM gateway modals

[uds5501]

Fixes #3446

Short description of what this resolves:

Add PayTM modal designs.
(actions will be linked once server PR has been completed)

Changes proposed in this pull request:

• PayTM payment options modal created
  

• OTP entering modal prepared simultaneously
  

Checklist

• I have read the Contribution & Best practices Guide.
• My branch is up-to-date with the Upstream development branch.
• The acceptance, integration, unit tests and linter pass locally with my changes
• I have added tests that prove my fix is effective or that my feature works
• I have added necessary documentation (if appropriate)

[mrsaicharan1]

For each modal, just keep adding screenshots of them to the description 🖼

[uds5501]

@mrsaicharan1 Yes, I'll be doing that

[shreyanshdwivedi]

As we are going to add action in followup PR, this LGTM as a skeleton

[uds5501]

@mrsaicharan1 @shreyanshdwivedi @kushthedude I have added the required validations in the modals. Please review now

[kushthedude]

LGTM!