[IMP] owl-vision: syntax scripts, single quotes attributes and slot props highlight and switch below command

This commit adds the following:

- Syntax builder scripts to make syntaxes easier to read and edit
- Syntax highlight in single quote attributes
- Syntax highlight for slot props
- Basic syntax highlight for xpaths
- Added `Switch Below` command

This commit fixes the following:

- Using `Switch Besides` or `Switch Below` does not open a new panel if one was already open
- Fixed missing space in component's snippet indentation

tools/owl-vision/snippets/component.json

@@ -3,13 +3,13 @@
         "prefix": "owlcomponent",
         "body": [
             "export class ${1:component-name} extends Component {",
-            "   static template = \"${2:template-name}\";",
-            "   static components = {};",
-            "   static props = {};",
+            "    static template = \"${2:template-name}\";",
+            "    static components = {};",
+            "    static props = {};",
             "",
-            "   setup() {",
+            "    setup() {",
             "",
-            "   }",
+            "    }",
             "}",
             ""
         ],