Mining of secondary resources

First of all sorry if this has been suggested elsewhere but with the tons of mining related issues I wasn't able to dig up anything related.

## Describe your suggestion
When going mining/caving/exploring as a normal player, one usually does not leave resources out in the open. Also when mining for X you often don't mind collecting Y along the way too.

While #mine can mine multiple blocks, it will also go search for it.

My suggestions therefore would be to have the pathfinding only go for a certain list of block types, and when along the path there are some of another list within X distance (or visible, per setting) those are mined too

## Settings
* primary mineable blocks: those are actively searched for and walked towards
* secondary blocks: those are only mined when within X distance
* secondary distacne: the distance to look for secondary blocks along the path
* only visible: only mine other visible blocks ( to not be suspicious)

## Context
Easier mining of lots of resources while concentrating on the most needed ones

Harder to detect that things are automated since real players often would do the same.

## 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.