GitLab

* Made 'configuration' package internal

* Made 'arduino' package internal

* Moved errors in their own package

* Moved directories init out of commands/internal/instances

* Updated docs

* Removed dep on pkg/errors library

* Update easyjson task and generated files

* Move the terminal detection subroutines in feedback package

This also fix the linter errors:

internal/cli/configuration/term.go:25:39: use of `os.Stdin` forbidden because "in cli package use `feedback.*` instead" (forbidigo)
var IsInteractive = isatty.IsTerminal(os.Stdin.Fd()) || isatty.IsCygwinTerminal(os.Stdin.Fd())
                                      ^
internal/cli/configuration/term.go:28:36: use of `os.Stdout` forbidden because "in cli package use `feedback.*` instead" (forbidigo)
var HasConsole = isatty.IsTerminal(os.Stdout.Fd()) || isatty.IsCygwinTerminal(os.Stdout.Fd())

* Fix linter warning

* Fixed docs:include-configuration-json-schema task

* Fixed build test for discovery_client