Add indent and ftplugin files

ftplugin/vue.vim

@@ -0,0 +1,10 @@
+" Vim filetype plugin
+" Language: Vue.js
+" Maintainer: Eduardo San Martin Morote
+" Author: Adriaan Zonnenberg
+
+if exists("b:did_ftplugin")
+  finish
+endif
+
+runtime! ftplugin/html.vim