Add diagram drafts

Author: RandomByte

rfcs/0009-ui5-project-refactoring.md

@@ -81,6 +81,8 @@ The `projectGraphBuilder` is called with an instance of one of the aforementione
 
 ### Proposed "Graph" Entities in Detail
 
+![UI5 Project: Graph Components](./resources/UI5_Project_Graph_Components.png)
+
 #### ProjectGraph
 A rooted, directed graph representing a UI5 project, its dependencies and available extensions
 
@@ -340,6 +342,8 @@ This concept is similar to the already existing [Formatters](https://github.com/
 
 Specifications should provide an API for accessing its resources via ui5-fs readers. This should make the [`@ui5/fs.resourceFactory#createCollectionsForTree`](https://sap.github.io/ui5-tooling/api/module-@ui5_fs.resourceFactory.html#.createCollectionsForTree) API obsolete, leaving decisions like whether to include the projects namespace to the project itself.
 
+![UI5 Project: Specification Class Diagram](./resources/UI5_Project_Specification_Class_Overview.png)
+
 The proposed resource access APIs for specifications are as follows:
 
 **To be discussed/To be done:**