[FEATURE] Add filter and Pagination in Customer Page

[VenuMadhav2541]

Feature Description

The current customer list API lacks support for:

1. Filtering customers based on parameters such as time_range or other fields.
2. Returning the total count of customers to support pagination on the frontend.

This causes incomplete pagination behavior and limits data retrieval flexibility when listing customers.

Possible Implementation

• Add new fields to the CustomerListRequest struct:

  pub struct CustomerListRequest {
      pub offset: Option<u32>,
      pub limit: Option<u16>,
      pub customer_id: Option<id_type::CustomerId>,
      pub time_range: Option<common_utils::types::TimeRange>,
  }

Have you spent some time checking if this feature request has been raised before?

• I checked and didn't find a similar issue

Have you read the Contributing Guidelines?

• I have read the Contributing Guidelines

Are you willing to submit a PR?

None