Refactor Package structure

This commit cleans up the package structure, to make two new top-level
packages `internal` (for internal-use packages) and `pkg` (for general
shared utility code).

component/web/web.go

@@ -1,38 +0,0 @@
-package web
-
-import (
-	"embed"
-
-	"github.com/FAU-CDI/wisski-distillery/component"
-)
-
-// Web implements the web component
-type Web struct {
-	component.ComponentBase
-}
-
-func (Web) Name() string {
-	return "web"
-}
-
-//go:embed all:stack
-//go:embed web.env
-var resources embed.FS
-
-func (web Web) Stack() component.Installable {
-	HTTPS_METHOD := "nohttp"
-	if web.Config.HTTPSEnabled() {
-		HTTPS_METHOD = "redirect"
-	}
-
-	return web.MakeStack(component.Installable{
-		Resources:   resources,
-		ContextPath: "stack",
-		EnvPath:     "web.env",
-
-		EnvContext: map[string]string{
-			"DEFAULT_HOST": web.Config.DefaultDomain,
-			"HTTPS_METHOD": HTTPS_METHOD,
-		},
-	})
-}