feature: Environment picker

[Shoxx98]

introduces environment picking using :Pioenv and both pickers.
modifies the behavior of Piocmd, Piocmdf, Piodebug.
also adds functionality in utils.lua. Those are unused as of now. I thought about saving the state of Pioenv to circumvent going the pio --list-targets route everytime and implemented some code before discarding all usage in favor of a more simple solution

[Shoxx98]

the stylua action failed because the service wasn't reachable. should be OK, as I reverted to an indent width of 2 in #0a2e1de and #1275e39

[anurag3301]

+462 -273, Looks like lot of changes. Will check it out. Meanwhile you can squash some commits and amend the commit messages

and you can just stylua $(find -name "*.lua) before making commit

[Shoxx98]

I changed the stylua config file in the project to have an indent width of 4 for editing content and reading code, because i couldnt read the code well with a width of 2. Does github go through all the changes across every commit and sum them up? If so, changing the indent width would inflate the numbers a lot.
Will do amending and squashing on the weekend probably.

[anurag3301]

I myself is not a big fan of 2 space indent. It just how it started and stayed. May change later to 4 space indent