Merged PR 212: Optimize FindChildrenById from O(n) to O(1)

Optimize FindChildrenById from O(n) to O(1):
- Deprecate FindContainerByIdDFS
- Container: Replace Children to string[]
- Add HashMap to IHistoryState that contains all containers

To access a container by id now cost O(1) without any additional cost

+ Implement CICD for SVGLibs

src/Components/App/App.tsx

@@ -1,7 +1,7 @@
 import React, { Dispatch, SetStateAction, useEffect, useRef, useState } from 'react';
 import { events as EVENTS } from '../../Events/AppEvents';
 import { MainMenu } from '../MainMenu/MainMenu';
-import { ContainerModel } from '../../Interfaces/IContainerModel';
+import { ContainerModel, IContainerModel } from '../../Interfaces/IContainerModel';
 import { Editor } from '../Editor/Editor';
 import { IEditorState } from '../../Interfaces/IEditorState';
 import { LoadState } from './Actions/Load';
@@ -81,12 +81,15 @@ export function App(props: IAppProps): JSX.Element {
     null,
     DEFAULT_MAINCONTAINER_PROPS
   );
+  const containers = new Map<string, IContainerModel>();
+  containers.set(defaultMainContainer.properties.id, defaultMainContainer);
 
   const [editorState, setEditorState] = useState<IEditorState>({
     configuration: DEFAULT_CONFIG,
     history: [{
       lastAction: '',
-      mainContainer: defaultMainContainer,
+      mainContainer: defaultMainContainer.properties.id,
+      containers,
       selectedContainerId: defaultMainContainer.properties.id,
       typeCounters: {},
       symbols: new Map(),