Add hooks for Essentials home teleports

[Rumsfield]

Add integration hooks for EssentialsX home teleport commands:

• [x] Prevent making homes outside of friendly territory, and optionally allow making homes in the wild.
• [x] Add general teleportation by other plugins to restrictions for travel command (e.g. cannot teleport into or out of enemy territory).

[Rumsfield]

https://essentialsx.net/wiki/Common-Issues.html#how-do-i-add-essentialsx-as-a-dependency

[Rumsfield]

Use this event to restrict updating homes: https://github.com/EssentialsX/Essentials/blob/2.x/Essentials/src/main/java/net/essentialsx/api/v2/events/HomeModifyEvent.java

[Rumsfield]

Use this event for preventing general teleports https://github.com/EssentialsX/Essentials/blob/2.x/Essentials/src/main/java/net/ess3/api/events/teleport/PreTeleportEvent.java