Refactor html templates

This commit entirely refactors the use of html templates. Instead of
inheriting from a shared template, we insert the results into a base
template.

internal/dis/component/server/templates/menu.go

@@ -1,49 +0,0 @@
-package templates
-
-import (
-	"html/template"
-	"net/http"
-
-	"github.com/FAU-CDI/wisski-distillery/internal/dis/component"
-	"github.com/FAU-CDI/wisski-distillery/pkg/mux"
-	"golang.org/x/exp/slices"
-)
-
-// buildMenu builds the manu for this request for all known components in this distillery.
-//
-// NOTE(twiesing): Don't name this method "Menu", as it will cause a stack overflow.
-func (tpl *Templating) buildMenu(r *http.Request) []component.MenuItem {
-
-	path := mux.NormalizePath(r.URL.Path)
-
-	// get the static menu items, and then return all the regular ones
-	var items []component.MenuItem
-	for _, m := range tpl.Dependencies.Menuable {
-		items = append(items, m.Menu(r)...)
-	}
-	for i, item := range items {
-		items[i].Active = string(item.Path) == path
-	}
-	slices.SortFunc(items, component.MenuItemSort)
-	return items
-}
-
-// Menu returns a list of menu items provided by routeables
-func (tpl *Templating) Menu(r *http.Request) []component.MenuItem {
-	return tpl.menu.Get(func() []component.MenuItem {
-		items := make([]component.MenuItem, 0, len(tpl.Dependencies.Routeables))
-		for _, route := range tpl.Dependencies.Routeables {
-			routes := route.Routes()
-			if routes.MenuTitle == "" {
-				continue
-			}
-			items = append(items, component.MenuItem{
-				Title:    routes.MenuTitle,
-				Priority: routes.MenuPriority,
-				Path:     template.URL(routes.Prefix),
-			})
-		}
-		slices.SortFunc(items, component.MenuItemSort)
-		return items
-	})
-}