Flatten lib namespace

Move all functions and classes currently available through lib/name and
libName to be under a single flat namespace in lib.  This make
reorganising the lib namespace much simpler as the location of symbols
can move without breaking the consumers of lib.

The multi-entrypoint design was already problematic for the web plugin
system which couldn't effectively use it due to how webpack's shared
module system is awkward to set up with multiple entrypoints per package.

packages/controller/src/WsServerConnector.js

@@ -1,20 +1,19 @@
 "use strict";
 const events = require("events");
 
-const libData = require("@clusterio/lib/data");
-const libLink = require("@clusterio/lib/link");
-const { logger } = require("@clusterio/lib/logging");
+const lib = require("@clusterio/lib");
+const { logger } = lib;
 
 
 /**
  * Connector for controller connections
  *
- * @extends module:lib/link.WebSocketBaseConnector
+ * @extends module:lib.WebSocketBaseConnector
  * @alias module:controller/src/WsServerConnector
  */
-class WsServerConnector extends libLink.WebSocketBaseConnector {
+class WsServerConnector extends lib.WebSocketBaseConnector {
 	constructor(dst, sessionId, sessionTimeout, heartbeatInterval) {
-		super(new libData.Address(libData.Address.controller, 0), dst);
+		super(new lib.Address(lib.Address.controller, 0), dst);
 
 		this._sessionTimeout = sessionTimeout;
 		this._socket = null;
@@ -40,16 +39,16 @@ class WsServerConnector extends libLink.WebSocketBaseConnector {
 	 * Sends the ready message over the socket to initiate the session.
 	 *
 	 * @param {Object} socket - WebSocket connection to client.
-	 * @param {module:lib/data.Address} src - Source address for this link.
+	 * @param {module:lib.Address} src - Source address for this link.
 	 * @param {string} sessionToken -
 	 *     the session token to send to the client.
-	 * @param {module:lib/data.AccountDetails=} account -
+	 * @param {module:lib.AccountDetails=} account -
 	 *     account data to provide to control connection
 	 */
 	ready(socket, src, sessionToken, account) {
 		this._socket = socket;
-		this._sendInternal(new libData.MessageReady(
-			new libData.ReadyData(
+		this._sendInternal(new lib.MessageReady(
+			new lib.ReadyData(
 				src,
 				sessionToken,
 				this._sessionTimeout,
@@ -89,8 +88,8 @@ class WsServerConnector extends libLink.WebSocketBaseConnector {
 			this._timeoutId = null;
 		}
 
-		this._sendInternal(new libData.MessageContinue(
-			new libData.ContinueData(this._sessionTimeout, this._heartbeatInterval, this._lastReceivedSeq)
+		this._sendInternal(new lib.MessageContinue(
+			new lib.ContinueData(this._sessionTimeout, this._heartbeatInterval, this._lastReceivedSeq)
 		));
 
 		this._state = "connected";