[Suggestion] Consecutive commands

Little suggestion, it would be great if we could put multiple commands in at once that would run one by one, for example
`goto -2012 80 8212 then disconnect`
`goal 0 0 then invert`
`goto portal then goto 7213 8212` (Go to nether coords)
`build portal then goto 7213 8212`
`goto 2312 721 then build bed then use bed then disconnect` (Go to a certain location then set your spawn there and then disconnect)

You can see that I've also suggested some new commands to compliment this, such as `use` which can goto and then interact with a placed block.

No files, tests, or entry points are identified in the issue. Start by locating how Baritone parses and executes commands, then define how chained commands should be separated, sequenced, and stopped; done means the listed command chains execute in order with clear handling for the suggested command additions.

Written by the indexing model from the issue text.