Improve path finding.

## Describe your suggestion
[Nether] For example, i wanna go to 1000 120 1000. And baritone will fly when there is enough durability and fireworks, if the terrain is bad, just walk, if there is mobs like wither or ghast, just fly away.
[Overworld] Similar to nether, but fall flying high in the sky to reduce firework use, if in big cave, just fly like in the nether.
[End] Also fly high, and add a new feature to automatically find endcities by using the world seed.

## Settings
#set smartpath true/false
#set cityfinder true/false
#set allowoverworldcaves true/false
#set escapefromwither(what ever the mob is) true/false

## Context
Describe how your suggestion would improve Baritone, or the reason behind it being added.

## Final checklist
- [v] I know how to properly use check boxes
- [v] I have not used any OwO's or UwU's in this issue.