_*=payment_razorpay

In This PR Razorpay payment onboarding form to take advantage of the Razorpay Connect Onboarding Flow. It integrates the Razorpay Onboarding using the IAP proxy.

**Purpose**
========
Help users easily onboard with Razorpay by using the Razorpay Connect API.

**Specification**
===========
**1.Connect and authorized the razorpay account.**

-   To connect to a sub-merchant's Razorpay account, the application redirects
   the user to a Razorpay-hosted webpage. The user can approve or deny the
   authorisation request on this page.


**2.Get an access token.**

- After you obtain an access token, you can use it to access the sub-merchant
data on Razorpay APIs. The access is controlled based on the scope requested
for and granted by the user during the authorization process.

**3.Get a refresh token.**

- You can use refresh tokens to generate a new access token. If your access
token expires, you will receive a 4XX response from the API. You can make a
request using your refresh token to generate a new access token.

**4.Revoke token.**

- The API supports token revocation to enhance security and manage access.
If needed, tokens can be revoked through this mechanism.

**5.Create & update webhook.**

- This method is responsible for creating or updating the Razorpay webhook
associated with the current Odoo instance.The webhook is crucial for
updating payment states within Odoo when changes occur in Razorpay.
 

**6.Revoke the application from Razorpay.**

- User can initiate the revocation of their application from the Razorpay side
facilitating a seamless process for application revocation.

task-3537535