add 5 predefined habits

[laura-ehlers]

solution comes with 5 predefined habits (at least one weekly and one daily habit)

[laura-ehlers]

For each predefined habit, you should provide example tracking data for a period of 4 weeks. This example data will later be used for testing purposes as so called “test fixture”. It will also be helpful to validate your approach as you program your solution, as you can more easily load habits when resorting to predefined data.