adds 2025 materials

exercises/Exercise 2 editable installation workflow.md

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+## Exercise 2: Editable installation workflow
+
+#### Goal
+
+Experience that working with an editable installation does not change how you interact with your code. 
+This is supposed to be easy and fun, so run the inspection often and make mistakes with the potion.
+
+Use your git skills to commit the changes you made to a new branch, and create a pull request.
+
+
+#### Tasks
+
+- In the `make_pizzas.py` file add another function that makes your favourite pizza.
+  Be creative with your toppings :).
+
+- Call this function from different places in your code
+  - in `make_pizzas.py` call your function in the if __name__ == "__main__" part
+  - add it to the tasting menu in the `scripts/run_pizza_restaurant.py` file
+  - replace the margherita pizza in the `src/daily_menu.py` file with your pizza
+
+-------------
+#### Extra credit
+
+Once you are done, reflect on what you did to find out where the function making the pizza was and how it worked
+- Where did you look, why did you look there first?
+- How did you figure out what it does? What part of the function did you read first?
+- Did it work on your first try? If not, how did you try to fix it - trial and error or read documentation?