Read Index for Repeat On Points not affected by Reverse

Checking the "Reverse" box for the Repeat on Points node doesn't change the order of the indices, like I'd expect.

Demo (performed on PWA of latest web version):

https://github.com/user-attachments/assets/c22badea-67a8-4ec8-8903-603ea8e93c80

Expected functionality:
The 0 is shown on the right, and the 4 is shown on the left, and similarly the 1 and 3 would be reversed, as though the vertices are being processed from right to left instead of left to right.

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PS. I'm ready to submit a PR that I believe fixes this issue, if that's something you'd be interested in.

从 Repeat on Points 节点开始，检查其 Reverse 选项如何影响生成的点索引。复现链接演示中显示的行为，然后验证启用 Reverse 后，索引会按从右到左的顺序显示，0 在右侧，4 在左侧。

由索引模型根据 Issue 内容生成。