AddDataSource: Updated page design & categories (#16971)

* minor refactoring

* Added category

* Minor progress

* Progres

* Updated descriptions

* Added custom sort

* NewDataSource: progress

* Updated design

* NewDataSource: Updated design

* Updated link

* Feedback changes

pkg/plugins/models.go

@@ -45,6 +45,7 @@ type PluginBase struct {
 	Includes     []*PluginInclude   `json:"includes"`
 	Module       string             `json:"module"`
 	BaseUrl      string             `json:"baseUrl"`
+	Category     string             `json:"category"`
 	HideFromList bool               `json:"hideFromList,omitempty"`
 	Preload      bool               `json:"preload"`
 	State        PluginState        `json:"state,omitempty"`