add g.berezin solution for days 18 and 19

Author: Grigorii Berezin

docs/2023/puzzles/day18.md

@@ -137,6 +137,7 @@ def part2(input: String): String =
 - [Solution](https://github.com/merlinorg/aoc2023/blob/main/src/main/scala/Day18.scala) by [merlin](https://github.com/merlinorg/)
 - [Solution](https://github.com/spamegg1/advent-of-code-2023-scala/blob/solutions/18.worksheet.sc#L101) by [Spamegg](https://github.com/spamegg1/)
 - [Solution](https://github.com/xRuiAlves/advent-of-code-2023/blob/main/Day18.scala) by [Rui Alves](https://github.com/xRuiAlves/)
+- [Solution](https://github.com/GrigoriiBerezin/advent_code_2023/tree/master/task18/src/main/scala) by [g.berezin](https://github.com/GrigoriiBerezin)
 
 Share your solution to the Scala community by editing this page.
 You can even write the whole article! [See here for the expected format](https://github.com/scalacenter/scala-advent-of-code/discussions/424)

docs/2023/puzzles/day19.md

@@ -234,6 +234,7 @@ def combinations(input: String, until: Long): Long =
 - [Solution](https://github.com/jnclt/adventofcode2023/blob/main/day19/aplenty.sc) by [jnclt](https://github.com/jnclt)
 - [Solution](https://github.com/rayrobdod/advent-of-code/blob/main/2023/19/day19.scala) by [Raymond Dodge](https://github.com/rayrobdod/)
 - [Solution](https://github.com/spamegg1/advent-of-code-2023-scala/blob/solutions/19.worksheet.sc#L101) by [Spamegg](https://github.com/spamegg1/)
+- [Solution](https://github.com/GrigoriiBerezin/advent_code_2023/tree/master/task19/src/main/scala) by [g.berezin](https://github.com/GrigoriiBerezin)
 
 Share your solution to the Scala community by editing this page.
 You can even write the whole article! [See here for the expected format](https://github.com/scalacenter/scala-advent-of-code/discussions/424)