Bug:  docs(cypress): Update Cypress README Documentation



### Feature Description

In this PR, I have updated the README file to include detailed information about Cypress test scenarios and the folder structure .
Added detailed instructions for adding new test scenarios to the ConnectorTest directory.
Included a clear explanation of the folder structure, guiding contributors on where to find specific files and directories related to Cypress tests.
Emphasized the importance of writing clear test scenarios using Cypress commands for effective testing.

By providing a descriptive title and detailed description, reviewers can quickly understand the purpose of the changes and ensure that the README file enhancements align with the project's goals and standards.

### Possible Implementation

In this PR, I have updated the README file to include detailed information about Cypress test scenarios and the folder structure .
Added detailed instructions for adding new test scenarios to the ConnectorTest directory.
Included a clear explanation of the folder structure, guiding contributors on where to find specific files and directories related to Cypress tests.
Emphasized the importance of writing clear test scenarios using Cypress commands for effective testing.

By providing a descriptive title and detailed description, reviewers can quickly understand the purpose of the changes and ensure that the README file enhancements align with the project's goals and standards.

### 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!


## Type of Change
<!-- Put an `x` in the boxes that apply -->

- [ ] Bugfix
- [ ] New feature
- [ ] Enhancement
- [ ] Refactoring
- [ ] Dependency updates
- [x] Documentation
- [ ] CI/CD

## Description

In this PR, I have updated the README file to include detailed information about Cypress test scenarios and the folder structure . 
    Added detailed instructions for adding new test scenarios to the ConnectorTest directory.
    Included a clear explanation of the folder structure, guiding contributors on where to find specific files and directories related to Cypress tests.
    Emphasized the importance of writing clear test scenarios using Cypress commands for effective testing.

By providing a descriptive title and detailed description, reviewers can quickly understand the purpose of the changes and ensure that the README file enhancements align with the project's goals and standards.



### 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 changes.

Following are the paths where you can find config files:
1. `config`
2. `crates/router/src/configs`
3. `loadtest/config`
-->


## Motivation and Context

This update aims to improve the documentation for contributors and provide a clearer understanding of the testing approach.



## Checklist
<!-- Put an `x` in the boxes that apply -->

- [ ] I formatted the code `cargo +nightly fmt --all`
- [ ] I addressed lints thrown by `cargo clippy`
- [ ] I reviewed the submitted code
- [ ] I added unit tests for my changes where possible
- [ ] I added a [CHANGELOG](/CHANGELOG.md) entry if applicable
