term: replace "working tree/dir" for "workspace"? (where appropriate)

[jorgeorpinel]

Extracted from #3245 (comment)

I found it in the following places, at least:

dvc/dvc/command/gc.py

Lines 15 to 17 in de1f67a

	msg = "This will remove all cache except items used in "
	msg += "the working tree"

dvc/dvc/repo/brancher.py

Line 33 in b99c5e4

yield "working tree"

dvc/scripts/completion/dvc.zsh

Line 76 in de1f67a

{-f,--force}"[Do not prompt when removing working directory files.]"

[jorgeorpinel]

@shcheklein another option is to remove the term "workspace" from everywhere and use "working tree" borrowed from Git/SCM. Not sure it would make sense to use that term for --noscm` projects though.

Related: iterative/dvc.org#931 (comment)

[jorgeorpinel]

I think this was closed by #3914 no @efiop ? 🙂

[efiop]

@jorgeorpinel Yes! Sorry for the delay. Closing.