[vue3] checkbox specification

1. when v-model type is Array or Set

	checked	unchecked
true-value	X	X
false-value	X	X
value	O	O
checked	X	X

2. when v-model type is not Array

	checked	unchecked
true-value	O	X
false-value	X	O
value	X	X
checked	X	X

3. when v-model is undefined or null

	checked	unchecked
true-value	O	X
false-value	X	O
value	X	X
checked	O	X