feat: Add `apply_interceptor` method for additional service configura…

[rustmailer]

…tion

This commit introduces the apply_interceptor method, which allows for additional configuration options like accept_compressed, send_compressed, max_decoding_message_size, and max_encoding_message_size when applying an interceptor.

Motivation

• The new method provides flexibility for users needing more control over service configuration.

Solution

• The existing with_interceptor method remains unchanged to maintain backward compatibility.