Update Gettext usage to address deprecation warning

[cbuctok]

Description

During compilation, the following deprecation warning is encountered:

warning: defining a Gettext backend by calling

    use Gettext, otp_app: ...

is deprecated. To define a backend, call:

    use Gettext.Backend, otp_app: :my_app

Then, instead of importing your backend, call this in your module:

    use Gettext, backend: MyApp.Gettext

  lib/phoenix_analytics/web/gettext.ex:4: PhoenixAnalytics.Web.Gettext (module)

This warning suggests that our current Gettext implementation is using a deprecated approach.

Current Implementation

The current implementation uses:

defmodule PhoenixAnalytics.Web.Gettext do
  @moduledoc false

  use Gettext, otp_app: :phoenix_analytics
end

Proposed Solution

To resolve this deprecation warning, we should update our Gettext usage as follows:

1. In lib/phoenix_analytics/web/gettext.ex:

defmodule PhoenixAnalytics.Web.Gettext do
  @moduledoc false

  use Gettext.Backend, otp_app: :phoenix_analytics
end

2. In modules where Gettext is currently imported, replace:

import PhoenixAnalytics.Web.Gettext

with:

use Gettext, backend: PhoenixAnalytics.Web.Gettext

Benefits

• Resolves the deprecation warning
• Aligns our codebase with the latest Gettext best practices
• Improves maintainability and future compatibility

Additional Notes

• This change should be backwards compatible, but thorough testing is recommended after implementation.
• We should review all files that import or use Gettext to ensure complete coverage of this update.

[lalabuy948]

Resoled in 0.1.3