Bug: [REFACTOR]: [Payme] Remove Default Case Handling



### :memo: Feature Description

- We utilize match statements to make pivotal decisions, such as generating requests based on the payment method type and managing responses received from the connector. 
- These conditions generally go hand in hand with enum variants. 
- Default case is used because a match statement needs to be exhaustive i.e. every variant needs to be covered. 
- So, if all the explicit cases are handled then default is used to handle the rest.
- Each connector have these match statements but many of them don’t provide reference to each variant in their default case, rather a `_` is put to handle all the other cases. 
- This approach carries a risk because developers may inadvertently overlook the need for explicit handling of the new cases.

### :hammer: Possible Implementation

- Instead of relying on a default match case `_`, developers should handle each and every variant explicitly. 
- By doing so, if there are any changes in the future, they can readily assess the impact of their modifications simply by compiling the code.
- You can check this PR for further reference https://github.com/juspay/hyperswitch/pull/1955

: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?

diff --git a/crates/router/src/connector/payme/transformers.rs b/crates/router/src/connector/payme/transformers.rs
index 4ced1a9bcda..1b7ce27439b 100644
--- a/crates/router/src/connector/payme/transformers.rs
+++ b/crates/router/src/connector/payme/transformers.rs
@@ -651,7 +651,20 @@ impl TryFrom<&types::PaymentsAuthorizeRouterData> for PayRequest {
                     language: LANGUAGE.to_string(),
                 })
             }
-            _ => Err(errors::ConnectorError::NotImplemented("Payment methods".to_string()).into()),
+            api::PaymentMethodData::CardRedirect(_)
+            | api::PaymentMethodData::Wallet(_)
+            | api::PaymentMethodData::PayLater(_)
+            | api::PaymentMethodData::BankRedirect(_)
+            | api::PaymentMethodData::BankDebit(_)
+            | api::PaymentMethodData::BankTransfer(_)
+            | api::PaymentMethodData::Crypto(_)
+            | api::PaymentMethodData::MandatePayment
+            | api::PaymentMethodData::Reward
+            | api::PaymentMethodData::Upi(_)
+            | api::PaymentMethodData::Voucher(_)
+            | api::PaymentMethodData::GiftCard(_) => Err(errors::ConnectorError::NotImplemented(
+                utils::get_unimplemented_payment_method_error_message("payme"),
+            ))?,
         }
     }
 }

## Type of Change

- [x] Refactoring

## Description

This PR removes the default case handling and adds error handling for all the available cases.

Fixes #2282 

## How did you test it?

No test cases. As In this PR only error message have been populated for all default cases.

## Checklist

- [x] I formatted the code `cargo +nightly fmt --all`
- [x] I addressed lints thrown by `cargo clippy`
- [x] I reviewed the submitted code
