vt: implement \ED and \EE

'\ED' is just like '\n'; move the cursor down to the next row, or if
it's at the bottom, scroll up one row.

'\EE' is just like '\n\r'

vt.c

@@ -615,10 +615,19 @@ esc_dispatch(struct terminal *term, uint8_t final)
         break;
     }
 
+    case 'D':
+        term_linefeed(term);
+        break;
+
     case 'M':
         term_reverse_index(term);
         break;
 
+    case 'E':
+        term_linefeed(term);
+        term_cursor_left(term, term->cursor.col);
+        break;
+
     case '0': {
         /* Configure G0-G3 to use special chars + line drawing */
         char param = term->vt.params.idx > 0 ? term->vt.params.v[0].value : '(';