Issue:
chore(codeowners): add codeowners data for PR reviews

## Type of Change
<!-- Put an `x` in the boxes that apply -->

- [ ] Bugfix
- [ ] New feature
- [x] Enhancement
- [ ] Refactoring
- [ ] Dependency updates

## Description

Adding a CODEOWNERS file for facilitating PR reviews for teams


### Additional Changes

- [ ] This PR modifies the database schema
- [ ] This PR modifies application configuration/environment variables

<!-- Provide links to the files with corresponding changes -->


## Motivation and Context
<!--
Why is this change required? What problem does it solve?
If it fixes an open issue, please link to the issue here.

If you don't have an issue, we'd recommend starting with one first so the PR
can focus on the implementation (unless its an obvious bug or documentation fix
that will have little conversation).
-->

This leads to better ownership boundaries & increased efficiency for reviewers

## How did you test it?
<!--
Did you write an integration/unit/API test to verify the code changes?
Or did you test this change manually (provide relevant screenshots)?
-->
Doesn't need to be tested

## Checklist
<!-- Put an `x` in the boxes that apply -->

- [x] I formatted the code `cargo +nightly fmt`
- [x] I addressed lints thrown by `cargo clippy`
- [x] I reviewed submitted code
- [ ] I added unit tests for my changes where possible
- [ ] I added a [CHANGELOG](/CHANGELOG.md) entry if applicable


Resolution:
<think>
PR Context:
- Title: feat(core): payment links - add support for custom background image and layout in details section
- Merged: 2024-12-12T15:48:18Z
- Files changed: 19 files
- Commits: 17 commits

Implementation approach:
## Type of Change
<!-- Put an `x` in the boxes that apply -->

- [ ] Bugfix
- [x] New feature
- [x] Enhancement
- [ ] Refactoring
- [ ] Dependency updates
- [ ] Documentation
- [ ] CI/CD

## Description
This PR introduces UI revamps to the payment links by including below changes - (described in #6711)
- Introduce `branding_visibility` in business profile's payment link config
- Introduce `details_layout` and `background_image` in both business profile and payments create API
- Co
</think>

To implement this, you'll need to modify:


**Detailed Implementation:**


**Commit 1:** feat(core): payment links - add support for custom background image and layout in details section (#
Files to modify:


**crates/api_models/src/admin.rs**
  Add:
    - struct: pub::PaymentLinkBackgroundImageConfig

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

**crates/common_enums/src/enums.rs**
  Add:
    - mod: private::ui

**crates/common_enums/src/enums/ui.rs**
  Add:
    - function: private::deserialize
    - function: private::expecting
    - function: private::visit_str
    - function: private::serialize
    - struct: private::ElementSizeVisitor
    - enum: pub::ElementPosition
    - enum: pub::ElementSize
    - enum: pub::SizeVariants
    - enum: pub::PaymentLinkDetailsLayout
    - impl: impl Deserialize<'de> for ElementSize
    - impl: impl Visitor<'_> for ElementSizeVisitor
    - impl: impl Serialize for ElementSize

**crates/diesel_models/src/business_profile.rs**
  Add:
    - struct: pub::PaymentLinkBackgroundImageConfig

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

**crates/hyperswitch_domain_models/src/lib.rs**
  Add:
    - function: private::convert_from
    - function: private::convert_back
    - impl: impl ApiModelToDieselModelConvertor<api_models::admin::PaymentLinkBackgroundImageConfig> for diesel_models::business_profile::PaymentLinkBackgroundImageConfig

**crates/openapi/src/openapi.rs**
  Modify existing code

**crates/openapi/src/openapi_v2.rs**
  Modify existing code

**crates/router/src/core/payment_link.rs**
  Modify existing code

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

**crates/router/src/types/transformers.rs**
  Add:
    - function: private::foreign_from
    - impl: impl ForeignFrom<diesel_models::business_profile::PaymentLinkBackgroundImageConfig> for api_models::admin::PaymentLinkBackgroundImageConfig