US-13: Show common facilities inside the building (Indoor POI)

As a user, I want to know where the common facilities (washrooms, water fountains, stairs, elevators) are located at.

Highlight indoor point of interest.

Associated epic: #20

Tasks:

[x] Make the point of interest rooms color coded in the floor plan.
[x] Make the stair, bathroom, elevators ... icons svgs, and add them in the floor plans.

Acceptance Criteria:

Step #	Execution Procedure or Input	Expected Results/Outputs	Passed/Failed
1	Display indoor map for a specified floor	Points of interest are clearly distinguishable and color-coded on the indoor map	Passed

Mockup:

samiha-rahman / soen390