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

public/svgld-settings.js

@@ -0,0 +1,3 @@
+export const API_FETCH_URL = 'http://localhost:5000';
+export const API_SET_CONTAINER_LIST_URL = 'http://localhost:5000/SetContainerList';
+export const API_GET_FEEDBACK_URL = 'http://localhost:5000/GetFeedback';