Cave Avoidance

## Describe your suggestion
Before the pathing has begun, Baritone will not make path plans through caves or ravines. (The concept is simple. Implementation might be different)

## Settings
- Disabled / Enabled

## Context
- Might do a better job at avoiding hostile mobs since mobAvoidance is not working for some reason
- Less of a chance of falling into lava

## Context **2** (Blog)
I've always thought that if this was added, Baritone wouldn't get itself killed every time I went AFK while it was mining diamonds. I am open to everybody's thoughts if this is a good idea or not. Or I'm completely wrong and this is a clone. Also, the only reason why I mentioned lava, is because there is a bug with the current version of Baritone and Impact, where if Baritone paths near lava (mostly in the nether), the player will fall right in. If this is non-existent with anyone else, please do say so, and ignore that section in Context. (This is my first "real" suggestion)

## Extra
- Will automatically be set to 'disabled' if legitMine is enabled

## Final checklist
- [✓] I have not used any OwO's or UwU's in this issue.