Issue:
Bug: fix(openapi): Fix broken pages in mintlify (v2)



v2 mintlify docs have several broken pages and some endpoints are missing.

Pull request description:
## Type of Change
<!-- Put an `x` in the boxes that apply -->

- [x] Bugfix
- [ ] New feature
- [ ] Enhancement
- [ ] Refactoring
- [ ] Dependency updates
- [x] Documentation
- [ ] CI/CD

## Description
<!-- Describe your changes in detail -->
Fixed the following mintlify pages:

- `v2/customers/customers--update.mdx`
- `payment-method-session--confirm-a-payment-method-session.mdx`
- `payment-method-session--delete-a-saved-payment-method.mdx`
- `payment-method-session--list-payment-methods.mdx`
- `payment-method-session--retrieve.mdx`
- `payment-method-session--update-a-saved-payment-method.mdx`

Added the following missing pages:

- `payment-method--list-customer-saved-payment-methods.mdx`
- `refunds--list.mdx`
- `refunds--metadata-update.mdx`
- `refunds--retrieve.mdx`
- `revenue-recovery--retrieve.mdx`

### Additional Changes

- [ ] This PR modifies the API contract
- [ ] This PR modifies the database schema
- [ ] This PR modifies application configuration/environment variables

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1. `config`
2. `crates/router/src/configs`
3. `loadtest/config`
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## Motivation and Context
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Why is this change required? What problem does it solve?
If it fixes an open issue, please link to the issue here.

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can focus on the implementation (unless it is an obvious bug or documentation fix
that will have little conversation).
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Closes #8381 

## How did you test it?
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Did you write an integration/unit/API test to verify the code changes?
Or did you test this change manually (provide relevant screenshots)?
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Verified with `mint dev`

## Checklist
<!-- Put an `x` in the boxes that apply -->

- [x] I formatted the code `cargo +nightly fmt --all`
- [x] I addressed lints thrown by `cargo clippy`
- [x] I reviewed the submitted code
- [ ] I added unit tests for my changes where possible


Testing:

Verified with `mint dev`

Patch:
diff --git a/crates/openapi/src/routes/payments.rs b/crates/openapi/src/routes/payments.rs
index 6160b68b44b..2d25ca4f77f 100644
--- a/crates/openapi/src/routes/payments.rs
+++ b/crates/openapi/src/routes/payments.rs
@@ -923,12 +923,7 @@ pub fn payments_update_intent() {}
         "X-Profile-Id" = String, Header,
         description = "Profile ID associated to the payment intent",
         example = "pro_abcdefghijklmnop"
-      ),
-      (
-        "X-Client-Secret" = String, Header,
-        description = "Client Secret Associated with the payment intent",
-        example = json!({"X-Client-Secret": "12345_pay_0193e41106e07e518940f8b51b9c8121_secret_0193e41107027a928d61d292e6a5dba9"})
-      ),
+      )
     ),
   request_body(
       content = PaymentsConfirmIntentRequest,
@@ -1058,11 +1053,6 @@ pub(crate) enum ForceSync {
           description = "Profile ID associated to the payment intent",
           example = "pro_abcdefghijklmnop"
         ),
-        (
-          "X-Client-Secret" = String, Header,
-          description = "Client Secret Associated with the payment intent",
-          example = json!({"X-Client-Secret": "12345_pay_0193e41106e07e518940f8b51b9c8121_secret_0193e41107027a928d61d292e6a5dba9"})
-        ),
     ),
     responses(
         (status = 200, description = "Get the payment methods", body = PaymentMethodListResponseForPayments),
diff --git a/crates/openapi/src/routes/tokenization.rs b/crates/openapi/src/routes/tokenization.rs
index 22f1227a9c0..d69008911ce 100644
--- a/crates/openapi/src/routes/tokenization.rs
+++ b/crates/openapi/src/routes/tokenization.rs
@@ -1,6 +1,9 @@
 use serde_json::json;
 use utoipa::OpenApi;
 
+/// Tokenization - Create
+///
+/// Create a token with customer_id
 #[cfg(feature = "v2")]
 #[utoipa::path(
     post,