Fix Link Portal

[Euphillya]

The portals on Folia are disabled, that's a fact. However, we can know when a player will arrive in a portal with this event: https://jd.papermc.io/paper/1.20/io/papermc/paper/event/entity/EntityInsideBlockEvent.html
This works very well as a solution, because I experimented with it on my Skyblock plugin for Folia.

Example with my code : Euphillya/Skyllia@f4646b1#diff-c59f1510ca874602d06e351e9b35637a7f553f9ad9eb1e07eff0687aa048ce02

[Euphillya]

Furthermore, to make it even better, since 1.20.3, Mojang has added in gamerule: PLAYERS_NETHER_PORTAL_CREATIVE_DELAY and PLAYERS_NETHER_PORTAL_DEFAULT_DELAY, it would be enough to change its value to a very high value, and put a teleportation delay like in Vanilla. We could definitely resimulate the teleportation of disabled portals.