Add Tridecco topic with description and logo

Author: TKanX

topics/tridecco/index.md

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+---
+display_name: Tridecco
+logo: tridecco.png
+related: einstein-problem
+short_description: Tridecco is a captivating puzzle game inspired by the 13-sided Einstein shape.
+topic: tridecco
+github_url: https://github.com/tridecco
+url: https://tridecco.com
+---
+
+An multiplayer board game using 13-sided pieces, based on Einstein's shape discovered in 2023. Players try to get rid of all of their pieces. Forming a hexagon of the same color, using two-color Einstein shapes will give the player another turn. Simultaneously they try to prevent their opponents from forming hexagons.
+
+- Official website: [tridecco.com](https://tridecco.com)
+- Online play: [play.tridecco.com](https://play.tridecco.com)
+- Open source: [github.com/tridecco](https://github.com/tridecco)