feat: node core strucutres added

node_core/src/sequencer_client/json.rs

@@ -0,0 +1 @@
+

node_core/src/sequencer_client/mod.rs

@@ -0,0 +1,8 @@
+use crate::config::NodeConfig;
+
+pub mod json;
+
+pub struct SequencerClient {
+    pub client: reqwest::Client,
+    pub config: NodeConfig,
+}