Issue:
[FEATURE]: Add support for merchant order reference id

### Feature Description

Add support for merchant order reference id

### Possible Implementation

Add support for merchant order reference id

### Have you spent some time checking if this feature request has been raised before?

- [X] I checked and didn't find a similar issue

### Have you read the Contributing Guidelines?

- [X] I have read the [Contributing Guidelines](https://github.com/juspay/hyperswitch/blob/main/docs/CONTRIBUTING.md)

### Are you willing to submit a PR?

Yes, I am willing to submit a PR!

Resolution:
<think>
PR Context:
- Title: feat(core): add merchant order reference id
- Merged: 2024-07-04T13:05:00Z
- Files changed: 22 files
- Commits: 9 commits

Implementation approach:
## Type of Change
<!-- Put an `x` in the boxes that apply -->

- [ ] Bugfix
- [x] New feature
- [ ] Enhancement
- [ ] Refactoring
- [ ] Dependency updates
- [ ] Documentation
- [ ] CI/CD

## Description
<!-- Describe your changes in detail -->
Add support for accepting `merchant_order_reference_id` and subsequently pass it to the connector if connector supports accepting multiple reference.
This is being added for merchant to locate the payment using their id in the connector dashb
</think>

To implement this, you'll need to modify:


**Detailed Implementation:**


**Commit 1:** feat(core): add merchant order reference id (#5197)
Co-authored-by: hyperswitch-bot[bot] <148525504+
Files to modify:


**crates/api_models/src/payments.rs**
  Modify existing code

**crates/diesel_models/src/payment_intent.rs**
  Modify existing code

**crates/diesel_models/src/schema.rs**
  Modify existing code

**crates/hyperswitch_domain_models/src/payments.rs**
  Modify existing code

**crates/hyperswitch_domain_models/src/payments/payment_attempt.rs**
  Modify existing code

**crates/hyperswitch_domain_models/src/payments/payment_intent.rs**
  Modify existing code

**crates/hyperswitch_domain_models/src/router_request_types.rs**
  Modify existing code

**crates/router/src/connector/adyen/transformers.rs**
  Modify existing code

**crates/router/src/connector/klarna/transformers.rs**
  Modify existing code

**crates/router/src/connector/paypal/transformers.rs**
  Modify existing code

**crates/router/src/core/payments/helpers.rs**
  Modify existing code

**crates/router/src/core/payments/operations/payment_confirm.rs**
  Modify existing code

**crates/router/src/core/payments/operations/payment_create.rs**
  Modify existing code

**crates/router/src/core/payments/operations/payment_update.rs**
  Modify existing code

**crates/router/src/core/payments/transformers.rs**
  Modify existing code

**crates/router/src/types.rs**
  Modify existing code

**crates/router/src/types/api/verify_connector.rs**
  Modify existing code

**crates/router/src/utils/user/sample_data.rs**
  Modify existing code

**crates/router/tests/connectors/utils.rs**
  Modify existing code