feat: new issue template

Signed-off-by: LetMeFly666 <[email protected]>

Author: LetMeFly666

.github/ISSUE_TEMPLATE/newSolution.md

@@ -0,0 +1,9 @@
+---
+name: 新题解
+about: 新增一道题的题解
+title: '[newSolution]Who can add 1 more problem of LeetCode xxx'
+labels: 题解
+assignees: 'LetMeFly666'
+---
+
+By Hand using [issue template(newSolution)](https://github.com/LetMeFly666/LeetCode/tree/master/.github/ISSUE_TEMPLATE/newSolution.md)