small quality of life improvements

1. erase the line under cursor with ,dd
2. free ,h ,j ,k ,l by mapping ,w to <c-w>
This will require some adjustments

ftplugin/c.vim

@@ -1,5 +1,9 @@
 iabbrev <buffer> prn printf("\n");
+cabbrev <buffer> Help term ++close man
+
 nnoremap <buffer> <localleader>fb ][%
 nnoremap <buffer> <localleader>fe ][
+nnoremap <buffer> <localleader>h :term ++rows=15 ++close man <cword><cr>
+nnoremap <buffer> <localleader>x :term ++rows=15 %:p:h/run<cr>
 
 setlocal foldmethod=syntax foldlevel=99