Added init command, improved plugin api

runtime/SparkPlug.php

@@ -1,6 +1,33 @@
 <?php
 
+use Spark\SparkApplication;
+
 abstract class SparkPlug
 {
     abstract public function load();
+
+    public function getPlugin(string $name)
+    {
+        return SparkApplication::$instance->getPluginManager()->getPlugin($name);
+    }
+
+    function get_resource(string $name) {
+        return SparkApplication::$instance->getResourceManager()->getNamedResource($name);
+    }
+
+    function read_config($file=null) {
+        if (!$file) return;
+        $abs = get_environment()->getConfigDirectory() . "/" . $file;
+        if (!file_exists($abs)) {
+            //fprintf(STDERR, "warning: Can't read config file %s\n", $abs);
+            return [];
+        }
+        return (array)json_decode(file_get_contents($abs), true);
+    }
+
+    function getProjectDirectory()
+    {
+        return SparkApplication::$instance->getEnvironment()->getProjectDirectory();
+    }
+    
 }