Massive UX rewrite

- Ditch multiple libraries for progressbar, spinner, colors and replace
  with pterm
- Detect when running on terminal and disable automatically spinner
- Add support for multiple progress bars
- Huge rewrite of the configuration part. No more crazy stuff with viper
  CLI commands now correctly overrides default config file as expected
- Limit banner to be displayed on relevant parts

Fixes #211
Fixes #105
Fixes #247
Fixes #233

pkg/compiler/types/spec/spec_suite_test.go

@@ -18,8 +18,7 @@ package compilerspec_test
 import (
 	"testing"
 
-	. "github.com/mudler/luet/cmd"
-	config "github.com/mudler/luet/pkg/config"
+	. "github.com/mudler/luet/cmd/util"
 
 	. "github.com/onsi/ginkgo"
 	. "github.com/onsi/gomega"
@@ -27,6 +26,6 @@ import (
 
 func TestSpec(t *testing.T) {
 	RegisterFailHandler(Fail)
-	LoadConfig(config.LuetCfg)
+	LoadConfig()
 	RunSpecs(t, "Spec Suite")
 }