feat: add solutions to lc problem: No.0281

[taoyq1988]

No.0281.Zigzag Iterator

[yanglbme]

Hello, the Go code template for Leetcode problem 281 is as follows. The code you provided does not match the problem's requirements, so I’ve made some modifications. The main change is related to the capitalization of function names.

type ZigzagIterator struct {
    
}

func Constructor(v1, v2 []int) *ZigzagIterator {
    
}

func (this *ZigzagIterator) next() int {
    
}

func (this *ZigzagIterator) hasNext() bool {
	
}

/**
 * Your ZigzagIterator object will be instantiated and called as such:
 * obj := Constructor(param_1, param_2);
 * for obj.hasNext() {
 *	 ans = append(ans, obj.next())
 * }
 */