Create 0101-symmetric-tree-iteratively.go and 0101-symmetric-tree-recursively.go

[Alex0M]

File(s) Modified: 0101-symmetric-tree-iteratively.go, 0101-symmetric-tree-recursively.go Language(s) Used: Go Submission URL: https://leetcode.com/problems/symmetric-tree/submissions/914189041/ https://leetcode.com/problems/symmetric-tree/submissions/914181009/