term: reorganize the module

vlib/term/term_js.v

@@ -0,0 +1,8 @@
+module term
+
+// get_terminal_size returns a number of colums and rows of terminal window.
+pub fn get_terminal_size() (int, int) {
+   // TODO Find a way to get proper width & height of the terminal
+   // on a Javascript environment
+   return default_columns_size, default_rows_size
+}