feat: add outline scm for jump among script style and template

Author: aizigao

languages/vue/outline.scm

@@ -0,0 +1,31 @@
+
+; Comments appear as annotations in the outline
+(comment) @annotation
+
+; ========== template =========
+(template_element
+  (start_tag
+    (tag_name) @name
+    (attribute
+      (attribute_name) @_lang
+      (quoted_attribute_value (attribute_value) @annotation))?)
+  (#eq? @_lang "lang")) @item
+
+; ======= script ======
+(script_element
+  (start_tag
+    (tag_name) @name
+    (attribute
+      (attribute_name) @_lang
+      (quoted_attribute_value (attribute_value) @annotation))?)
+  (#eq? @_lang "lang")) @item
+
+
+; ========= style =========
+(style_element
+  (start_tag
+    (tag_name) @name
+    (attribute
+      (attribute_name) @_lang
+      (quoted_attribute_value (attribute_value) @annotation))?)
+  (#eq? @_lang "lang")) @item