feat: update leetcode solutions: No.0179. Largest Number

feat: add leetcode solutions: No.0709. To Lower Case

feat: update leetcode solutions: No.0304. Range Sum Query 2D - Immutable

feat: update leetcode solutions: No.0199. Binary Tree Right Side View

feat: update leetcode solutions: No.0019. Remove Nth Node From End of…

… List

feat: add solutions to leetcode problem: No.1047

feat: update solutions to leetcode problem: No.0002

fix: update sorting algorithms

feat: add golang solution for leetcode 0097