feat: adding lots of new tests for the tutorial and solution

[Nickname5862]

Lots of new tests have been added to the tutorial part of Sherlock. These include:

• Swapped 7 - advanced with 8 - util to be able to use advanced techniques in the utils.
• More tests, including reactor options order of execution (3), fallback-to (5), errors (6), templates, take, map on arrays, mapState, flatMap, states, pluck (7), and pairwise/scan on normal arrays, peek, lift, final, promise, fromObservable, fromEventPattern... (8).
• Added a solution for the bonus exercise in (9) which previously lacked a solution.
• The tutorial and solutions are now both available in the same branch. To prevent making every change twice, all changes should now be put in the generator folder rather than directly in the tutorial or solution folder.
  • Also, a generateTutorialAndSolution file has created to automatically transform the files in the generator folder to the tutorial and solution files in the tutorial and solution folders. This way, a single change has to be made in the generator files which is immediately propagated to changes in the tutorial and solution files when using the command npm run generate.

TODO: new things can still be added to the tutorial, such as:

• Lenses (didn't sound too interesting though)
• Cyclic Reactors (preventing, when two atoms are dependent on each other, that infinite cyclic behavior occurs. Unsure whether we currently prevent cyclic behavior or allow it until a maximum depth)
• Transactions (the atomic() function - allowing multiple atoms to be changed simultaneously without triggering a derive or react update in-between)

TODO: also check how you can make sure that this Semantic PRs automatically makes a changelog for me.

But that's for another KipSate!