QmlDesigner: Add a couple of example .qml files for manual testing

tests/manual/qml/testfiles/helloworld.qml

+import Qt 4.6
+
+Rectangle {
+    width: 200
+    height: 200
+    Text {
+        x: 66
+        y: 93
+        text: "Hello World"
+    }
+}

tests/manual/qml/testfiles/helloworld_inverted.qml

+import Qt 4.6
+
+Rectangle {
+    width: 200
+    height: 200
+    color: "black"
+    Text {
+        x: 66
+        y: 93
+        text: "Hello World"
+        color: "white"
+    }
+}

tests/manual/qml/testfiles/states.qml

+import Qt 4.6
+
+Rectangle {
+    id: rect
+    width: 200
+    height: 200
+    Text {
+        x: 66
+        y: 93
+        text: "Base State"
+    }
+    states: [
+        State {
+            name: "State1"
+            PropertyChanges {
+                target: rect
+                color: "blue"
+            }
+            PropertyChanges {
+                target: text
+                text: "State1"
+            }
+        },
+        State {
+            name: "State2"
+            PropertyChanges {
+                target: rect
+                color: "gray"
+            }
+            PropertyChanges {
+                target: text
+                text: "State2"
+            }
+        }
+    ]
+}

tests/manual/qml/testfiles/testfiles.qmlproject

+// File generated by QtCreator
+
+import QmlProject 1.0
+
+Project {
+    // Scan current directory for .qml, .js, and image files
+    QmlFiles {
+        directory: "."
+    }
+    JavaScriptFiles {
+        directory: "."
+    }
+    ImageFiles {
+        directory: "."
+    }
+}