feat: add prelude module for convenient imports

Add src/prelude.rs that re-exports all commonly used types:
- Client types: LightstreamerClient, ClientConfig, SimpleClient
- Subscription types: Subscription, SubscriptionMode, ItemUpdate
- Connection types: ConnectionOptions, ConnectionDetails
- Listener traits: ClientListener, SubscriptionListener
- Error types: LightstreamerError, Result
- Utility functions

Usage: use lightstreamer_rs::prelude::*;

Author: joaquinbejar

src/lib.rs

@@ -332,3 +332,12 @@ pub mod client;
 ///
 /// This module provides types for managing connection details and options.
 pub mod connection;
+
+/// Prelude module for convenient imports.
+///
+/// Import all commonly used types with a single `use` statement:
+///
+/// ```ignore
+/// use lightstreamer_rs::prelude::*;
+/// ```
+pub mod prelude;

src/prelude.rs

@@ -0,0 +1,45 @@
+//! # Prelude Module
+//!
+//! This module provides convenient re-exports of the most commonly used types
+//! and traits from the Lightstreamer client library.
+//!
+//! By importing the prelude, you can quickly access all essential types:
+//!
+//! ```ignore
+//! use lightstreamer_rs::prelude::*;
+//! ```
+//!
+//! This imports:
+//! - Client types: `LightstreamerClient`, `ClientConfig`, `SimpleClient`
+//! - Subscription types: `Subscription`, `SubscriptionMode`, `ItemUpdate`
+//! - Connection types: `ConnectionOptions`, `ConnectionDetails`
+//! - Listener traits: `ClientListener`, `SubscriptionListener`
+//! - Error types: `LightstreamerError`, `Result`
+//! - Utility types and functions
+
+// Client types
+pub use crate::client::{
+    ClientConfig, ClientListener, ClientMessageListener, ClientStatus, ConnectionType,
+    DisconnectionType, LightstreamerClient, LogType, SimpleClient, SubscriptionParams,
+    SubscriptionRequest, Transport,
+};
+
+// Subscription types
+pub use crate::subscription::{
+    ChannelSubscriptionListener, ItemUpdate, Snapshot, Subscription, SubscriptionListener,
+    SubscriptionMode,
+};
+
+// Connection types
+pub use crate::connection::{
+    ConnectionDetails, ConnectionEvent, ConnectionManager, ConnectionMetrics, ConnectionOptions,
+    ConnectionState, DisconnectionReason, HeartbeatConfig, ReconnectionConfig, ReconnectionError,
+    SubscriptionError, SubscriptionManager, SubscriptionState, SubscriptionStatistics,
+    SubscriptionStatus,
+};
+
+// Error types
+pub use crate::utils::{LightstreamerError, Result};
+
+// Utility types and functions
+pub use crate::utils::{Proxy, clean_message, parse_arguments, setup_logger, setup_signal_hook};