term: add missing documentation for all remaining public functions (#17044)

vlib/term/ui/input_windows.c.v

@@ -34,6 +34,7 @@ fn restore_terminal_state() {
 	os.flush()
 }
 
+// init initializes the context of a windows console given the `cfg`.
 pub fn init(cfg Config) &Context {
 	mut ctx := &Context{
 		cfg: cfg
@@ -99,6 +100,7 @@ pub fn init(cfg Config) &Context {
 	return ctx
 }
 
+// run starts the windows console or restarts if it was paused.
 pub fn (mut ctx Context) run() ? {
 	frame_time := 1_000_000 / ctx.cfg.frame_rate
 	mut init_called := false