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.

plugins/research_sync/instance.js

@@ -1,6 +1,5 @@
 "use strict";
-const libPlugin = require("@clusterio/lib/plugin");
-const libLuaTools = require("@clusterio/lib/lua_tools");
+const lib = require("@clusterio/lib");
 const {
 	ContributionEvent,
 	ProgressEvent,
@@ -10,7 +9,7 @@ const {
 } = require("./messages");
 
 
-class InstancePlugin extends libPlugin.BaseInstancePlugin {
+class InstancePlugin extends lib.BaseInstancePlugin {
 	unexpectedError(err) {
 		this.logger.error(`Unexpected error:\n${err.stack}`);
 	}
@@ -40,7 +39,7 @@ class InstancePlugin extends libPlugin.BaseInstancePlugin {
 		if (!this.syncStarted || !["starting", "running"].includes(this.instance.status)) {
 			return;
 		}
-		let techsJson = libLuaTools.escapeString(JSON.stringify(event.technologies));
+		let techsJson = lib.escapeString(JSON.stringify(event.technologies));
 		await this.sendOrderedRcon(`/sc research_sync.update_progress("${techsJson}")`, true);
 	}
 
@@ -54,7 +53,7 @@ class InstancePlugin extends libPlugin.BaseInstancePlugin {
 		}
 		let { name, level } = event;
 		await this.sendOrderedRcon(
-			`/sc research_sync.research_technology("${libLuaTools.escapeString(name)}", ${level})`, true
+			`/sc research_sync.research_technology("${lib.escapeString(name)}", ${level})`, true
 		);
 	}
 
@@ -89,7 +88,7 @@ class InstancePlugin extends libPlugin.BaseInstancePlugin {
 		}
 
 		if (techsToSync.length) {
-			let syncJson = libLuaTools.escapeString(JSON.stringify(techsToSync));
+			let syncJson = lib.escapeString(JSON.stringify(techsToSync));
 			await this.sendOrderedRcon(`/sc research_sync.sync_technologies("${syncJson}")`, true);
 		}
 	}