Add basic syntax files

- Set the filetype to "vue" for files with a .vue extension
 - Define regions for <template>, <style>, and <script> tags
 - Include HTML, CSS, and JavaScript syntax highlighting for the <template>,
   <style>, and <script> regions

ftdetect/vue.vim

@@ -0,0 +1 @@
+au BufNewFile,BufRead *.vue setf vue