feat: add paytm to create event and order-form page

[shreyanshdwivedi]

Fixes #3388

Changes proposed in this pull request:

• It adds paytm to create event and order-form page

Create Event

New Order

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)

[kushthedude]

It's incomplete as soon as organiser select Accept By PayTM, A field should or button should pop-up to connect with PayTM, As done in Stripe.

[shreyanshdwivedi]

@kushthedude as discussed with @uds5501 @mrsaicharan1 we are starting by accepting payment to current admin's account to see if everything works initially.
Then we'll shift to accept organizer's account and connect it later. I hope this makes sense

[mrsaicharan1]

It's incomplete as soon as organiser select Accept By PayTM, A field should or button should pop-up to connect with PayTM, As done in Stripe.

Every payment gateway has its own unique workflow. The other implementation details can be looked at afterwards as this is a sub issue. This is fine.

[uds5501]

@shreyanshdwivedi Please take a look at Travis?

[shreyanshdwivedi]

@uds5501 @mrsaicharan1 @kushthedude @CosmicCoder96 it was a random fail. Please have a look

[kushthedude]

Lgtm!