NavTree: Make it possible to configure where in nav tree plugins live (#55484)

* NewIA: Plugin nav config

* progress

* Progress

* Things are working

* Add monitoring node

* Add alerts and incidents

* added experiment with standalone page

* Refactoring by adding a type for navtree root

* First test working

* More tests

* more tests

* Progress on richer config and sorting

* Sort weight working

* Path config

* Improving logic for not including admin or cfg nodes, making it the last step so that enterprise can add admin nodes without having to worry about the section not existing

* fixed index routes

* removed file

* Fixes

* Fixing tests

* Fixing more tests and adding support for weight config

* Updates

* Remove unused fake

* More fixes

* Minor tweak

* Minor fix

* Can now control position using sortweight even when existing items have no sortweight

* Added tests for frontend standalone page logic

* more tests

* Remove unused fake and fixed lint issue

* Moving reading settings to navtree impl package

* remove nav_id setting prefix

* Remove old test file

* Fix trailing newline

* Fixed bug with adding nil node

* fixing lint issue

* remove some code we have to rethink

* move read settings to PrivideService and switch to util.SplitString

pkg/plugins/fakes.go

@@ -0,0 +1,38 @@
+package plugins
+
+import (
+	"context"
+)
+
+type FakePluginStore struct {
+	Store
+
+	PluginList []PluginDTO
+}
+
+func (pr FakePluginStore) Plugin(_ context.Context, pluginID string) (PluginDTO, bool) {
+	for _, v := range pr.PluginList {
+		if v.ID == pluginID {
+			return v, true
+		}
+	}
+
+	return PluginDTO{}, false
+}
+
+func (pr FakePluginStore) Plugins(_ context.Context, pluginTypes ...Type) []PluginDTO {
+	var result []PluginDTO
+	if len(pluginTypes) == 0 {
+		pluginTypes = PluginTypes
+	}
+
+	for _, v := range pr.PluginList {
+		for _, t := range pluginTypes {
+			if v.Type == t {
+				result = append(result, v)
+			}
+		}
+	}
+
+	return result
+}