added snippets for DI

Author: lfolco

snippets/di/preference.json

@@ -0,0 +1,9 @@
+{
+	"DI Preference": {
+		"prefix": "m2.di.pref",
+		"body": [
+			"<preference for=\"${1:Fully Qualified Classname}\" type=\"${2:Fully Qualified Classname}\" />$0",
+		],
+		"description": "Magento 2 DI preference"
+	}
+}

snippets/di/scaffold.json

@@ -0,0 +1,12 @@
+{
+	"DI Scaffold": {
+		"prefix": "m2.di",
+		"body": [
+			"<?xml version=\"1.0\"?>",
+			"<page xmlns:xsi=\"http://www.w3.org/2001/XMLSchema-instance\" xsi:noNamespaceSchemaLocation=\"urn:magento:framework:ObjectManager/etc/config.xsd\">",
+			"\t$0",
+			"</page>"
+		],
+		"description": "Magento 2 DI scaffold"
+	}
+}

snippets/di/type.json

@@ -0,0 +1,27 @@
+{
+	"DI Type": {
+        "prefix": "m2.di.type",
+        "body": [
+            "<type name=\"${1:Fully Qualified Classname}\">",
+            "\t$0",
+            "</type>"
+        ],
+        "description": "Magento 2 DI type"
+    },
+	"DI Type Arguments": {
+        "prefix": "m2.di.type.args",
+        "body": [
+            "<arguments>",
+            "\t<argument name=\"${1:Constructor Argument}\" xsi:type=\"${2|array,boolean,number,null,object,string|}\">$0</argument>",
+            "</arguments>"
+        ],
+        "description": "Magento 2 DI type arguments"
+	},
+	"DI Type Argument Item": {
+		"prefix": "m2.di.type.args.item",
+		"body": [
+            "<item name=\"${1}\" xsi:type=\"${2|array,boolean,number,null,object,string|}\">$0</item>"
+		],
+        "description": "Magento 2 DI type argument item"
+	}
+}

snippets/di/virtualtype.json

@@ -0,0 +1,11 @@
+{
+	"DI Virtual Type": {
+        "prefix": "m2.di.virtualtype",
+        "body": [
+            "<virtualType name=\"${1:Virtual Type Name}\" type=\"${2:Fully Qualified Classname}\">",
+            "\t$0",
+            "</virtualType>"
+        ],
+        "description": "Magento 2 DI type"
+    }
+}