Issue:
Docs: Adding More descriptive details in the Payouts module

We have received feedback about the Payout Module in API ref lacking in description of the various fields.

Resolution:
<think>
PR Context:
- Title: Docs: API-Ref changes for Payouts
- Merged: 2024-07-31T07:33:43Z
- Files changed: 5 files
- Commits: 15 commits

Implementation approach:
## Type of Change
<!-- Put an `x` in the boxes that apply -->

- [ ] Bugfix
- [ ] New feature
- [ ] Enhancement
- [ ] Refactoring
- [ ] Dependency updates
- [X] Documentation
- [ ] CI/CD

## Description
<!-- Describe your changes in detail -->


### Additional Changes

- [ ] This PR modifies the API contract
- [ ] This PR modifies the database schema
- [ ] This PR modifies application configuration/environment variables

<!--
Provide links to the files with corresponding ch
</think>

To implement this, you'll need to modify:


**Detailed Implementation:**


**Commit 1:** Docs: API-Ref changes for Payouts (#5236)
Co-authored-by: hyperswitch-bot[bot] <148525504+hyperswitc
Files to modify:


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

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

**crates/common_enums/src/enums.rs**
  Modify existing code

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