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/backend/common.go

@@ -53,7 +53,7 @@ func runCommand(cmd *exec.Cmd) error {
 	cmd.Stderr = writer
 
 	if buffered {
-		Spinner(22)
+		Spinner(32)
 		defer SpinnerStop()
 	}