Adding nearby item picking up or that @mine works only in selected area

## Describe your suggestion
I need to @mine but only in selected plot of land

Currently we are able to select area and command baritone to dig certain blocks in it but **it is not picking items up**.
Would be great if you would be able to add some _#set_ for picking up list of items that are nearby, or somehow merge @mine with
area selection.

## Settings

_@set mineOnlyInSeletedArea true/false_

or something along

_@set nearbyItemPickup (Boolean)_
_@set nearbyItemPickup (List<>)_
_@set nearbyItemPickupRange (integer)_

## Context
I dont know basically anything about programming. I am lazy ass bitch who uses baritone to farm/do stuff on some kids server while i sleep or watch some videos.
It is pain in the ass that i have to alt tab to minecraft every 4min to collect items that have fallen to the ground before they despawn.

_#set nearbyItemPickup_ would be great multipurpose addition. It could be used from picking up samplings from fallen trees to collecting loot on some farms.

I dont know if nearbyItemPickup would be importand enough to make it into commang like @farm, @follow, @mine, @goto or others, so my proposition is to add it as setting that is executed in the background. It would execute main command for some time for example **@sel ca** some amount of blocks and then collect everything that fallen out of them, just like in @mine.

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