Set vim autoindent

Do not interfere with filetype indentation.
Simply reproduce the previous indentation when creating a new line.
Ref : https://vim.fandom.com/wiki/Indenting_source_code

Install/Templates/vimrc

@@ -2,3 +2,4 @@ syntax on
 set softtabstop=4
 set shiftwidth=4
 set expandtab
+set autoindent