Create stubbed ModuleProvider and add module loading tools to Environment class

src/main/kotlin/io/smnp/api/environment/Environment.kt

@@ -1,4 +1,19 @@
 package io.smnp.api.environment
 
+import io.smnp.api.module.Module
+import io.smnp.module.loader.ModuleProvider
+
 class Environment {
+    private val rootModule = Module("<root>")
+    private val loadedModules = mutableListOf<String>()
+
+    fun loadModule(path: String) {
+        val module = ModuleProvider.getModule(path)
+        rootModule.addSubmodule(module)
+        loadedModules.add(path)
+    }
+
+    fun printModules(printContent: Boolean) {
+        rootModule.pretty(printContent)
+    }
 }

src/main/kotlin/io/smnp/module/loader/ModuleProvider.kt

@@ -0,0 +1,10 @@
+package io.smnp.module.loader
+
+import io.smnp.api.module.Module
+
+object ModuleProvider {
+    fun getModule(path: String): Module {
+        // TODO: It's only stub for real module provider
+        return Module.create(path)
+    }
+}