Issue:
[REFACTOR] : [Square] Error Message For Connector Implementation

### :memo: Feature Description

- In terms of errors, we are currently throwing a 'not supported' message, which shouldn't be the case as we are yet to decide on the implementation.


### :hammer: Possible Implementation

- In order to manage payment methods that are not implemented by Hyperswitch or yet to be implemented, the connector transformers file should make use of the NotImplemented ConnectorError enum variant.
- By doing so, we will throw same error message for all the Connector Implementation 
- You can check this PR for further reference https://github.com/juspay/hyperswitch/pull/2831


:bookmark: Note: All the changes needed should be contained within `hyperswitch/crates/router/src/connector/`


### :package: Have you spent some time checking if this feature request has been raised before?

- [X] I checked and didn't find a similar issue

### :package: Have you read the Contributing Guidelines?

- [X] I have read the [Contributing Guidelines](https://github.com/juspay/hyperswitch/blob/main/docs/CONTRIBUTING.md)

### :sparkles: Are you willing to submit a PR?


Resolution:
<think>
PR Context:
- Title: refactor(connector): [Square] change error message from NotSupported to NotImplemented
- Merged: 2024-02-27T11:37:14Z
- Files changed: 1 files
- Commits: 4 commits

Implementation approach:
## Type of Change

- [ ] Bugfix
- [ ] New feature
- [ ] Enhancement
- [x] Refactoring
- [ ] Dependency updates
- [ ] Documentation
- [ ] CI/CD

## Description
Consistent error messages for not implemented payment method.


## Motivation and Context

Resolves  #2861

## How did you test it?
payment connector create
```
{
    "connector_type": "fiz_operations",
    "connector_name": "volt",
    "connector_account_details": {
        "auth_type": "MultiAuthKey",
        "a
</think>

To implement this, you'll need to modify:


**Detailed Implementation:**


**Commit 1:** refactor(connector): [Square] change error message from NotSupported to NotImplemented (#2875)
Co-au
Files to modify:


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