Project structure refactor:

- Change package name general_server to gateway
- Changing the structure of directories and packages
- Adding vendor to the project

internal/server/rpc/definition.go

@@ -0,0 +1,29 @@
+package rpc
+
+type RPCRequest struct {
+	JSONRPC string           `json:"jsonrpc"`
+	ID      any              `json:"id"`
+	Method  string           `json:"method"`
+	Params  RPCRequestParams `json:"params"`
+}
+
+type RPCRequestParams struct {
+	ContextVersion string         `json:"context-version"`
+	Method         map[string]any `json:"method-params"`
+}
+
+type RPCResponse struct {
+	JSONRPC string `json:"jsonrpc"`
+	ID      any    `json:"id"`
+	Result  any    `json:"result"`
+}
+
+type RPCError struct {
+	JSONRPC string `json:"jsonrpc"`
+	ID      any    `json:"id"`
+	Error   any    `json:"error"`
+}
+
+const (
+	JSONRPCVersion = "2.0"
+)