feat(starknet_l1_provider): add the trait interface for L1 gas price …

…provider

crates/starknet_l1_provider/src/lib.rs

@@ -2,6 +2,7 @@ pub mod bootstrapper;
 
 use papyrus_config::converters::deserialize_float_seconds_to_duration;
 pub mod communication;
+pub mod l1_gas_price_provider;
 pub mod l1_provider;
 pub mod l1_scraper;
 pub mod soft_delete_index_map;