installer: clean up codebase

* introduce helper soft package to work with SoftServe
* move commands to cmd/
diff --git a/core/installer/config.go b/core/installer/config.go
index 27bb229..4563f4d 100644
--- a/core/installer/config.go
+++ b/core/installer/config.go
@@ -1,4 +1,4 @@
-package main
+package installer
 
 type Config struct {
 	Values Values `json:"values"`