[vim] Move vim config files to vim directory

Vim now also supports XDG_CONFIG_HOME for its config files. So use that.

nvim/init.lua

@@ -42,8 +42,8 @@ function addGitTopLevelDirectoryToRuntimePath()
 end
 
 vim.cmd [[
-    source ~/.vimrc.common
-    source ~/.vim/plugins.vim
+    source $XDG_CONFIG_HOME/vim/vimrc.common
+    source $XDG_CONFIG_HOME/vim/plugins.vim
 ]]
 
 addGitTopLevelDirectoryToRuntimePath()

vim/vimrc

@@ -1,7 +1,8 @@
 " ~/.vimrc
 " Eryn Wells <eryn@erynwells.me>
 
-source ~/.vimrc.common
+source $XDG_CONFIG_HOME/vim/vimrc.common
+source $XDG_CONFIG_HOME/vim/plugins.vim
 
 if !has('nvim')
     set nocompatible        " use enhanced vim features
@@ -24,4 +25,6 @@ if !has('nvim')
     "   :   maximum number of lines of command history to save
     "   s   shada entries over 100 KiB are skipped
     set viminfo=%100,'100,h,<1000,:100,s100
+
+    colorscheme zaibatsu
 endif