Add day 8 community solution - Rui Alves (#413)

Co-authored-by: Jamie Thompson <[email protected]>

docs/2023/puzzles/day08.md

@@ -8,8 +8,11 @@ https://adventofcode.com/2023/day/8
 
 ## Solutions from the community
 
+Share your solution to the Scala community by editing this page. (You can even write the whole article!)
+
 - [Solution](https://github.com/lenguyenthanh/aoc-2023/blob/main/Day08.scala) by [Thanh Le](https://github.com/lenguyenthanh)
 - [Solution](https://github.com/GrigoriiBerezin/advent_code_2023/tree/master/task08/src/main/scala) by [g.berezin](https://github.com/GrigoriiBerezin)
+- [Solution](https://github.com/xRuiAlves/advent-of-code-2023/blob/main/Day8.scala) by [Rui Alves](https://github.com/xRuiAlves/)
 - [Solution](https://github.com/bishabosha/advent-of-code-2023/blob/main/2023-day08.scala) by [Jamie Thompson](https://github.com/bishabosha)
 
 Share your solution to the Scala community by editing this page. (You can even write the whole article!)