vscode: Add a hello world file template (#7089)

* vscode: Add a hello world file template

* Update editors/vscode/snippets/slint.json

Co-authored-by: Simon Hausmann <hausmann@gmail.com>

editors/vscode/package.json

@@ -159,6 +159,12 @@
         }
       }
     },
+    "snippets": [
+      {
+        "language": "slint",
+        "path": "./snippets/slint.json"
+      }
+    ],
     "walkthroughs": [
       {
         "id": "slint.welcomeWalkthrough",

editors/vscode/snippets/slint.json

@@ -0,0 +1,21 @@
+{
+  "Hello World": {
+    "prefix": ["hello world window"],
+    "isFileTemplate": true,
+    "body": [
+      "import { AboutSlint, VerticalBox } from \"std-widgets.slint\";",
+      "",
+      "export component MainWindow inherits Window {",
+      "    VerticalBox {",
+      "        Text {",
+      "            text: \"Hello World!\";",
+      "        }",
+      "        AboutSlint {",
+      "            preferred-height: 150px;",
+      "        }",
+      "    }",
+      "}"
+    ],
+    "description": "A Hello World window written in Slint"
+  }
+}