Update tutorials to reflect latest changes in Exposure class

[spjuhel]

Is your feature request related to a problem? Please describe.
Some tutorials in the documentation are not up to date with the latest changes in the Exposures class. For example, the tutorial on User-Defined Point Exposure and Tropical Cyclone Hazard still uses a deprecated approach for instantiating Exposure objects. This inconsistency might confuse users and lead to errors when they try to replicate examples.

Describe the solution you'd like
All tutorials and documentation examples should be reviewed and updated to reflect the latest instantiation methods for Exposure objects.

Describe alternatives you've considered

• Adding a warning or note in the documentation pointing out where the code is outdated, while working on a full update.

The next steps for this issue include:

1. Checking all places in the documentation where Exposure objects are instantiated.
2. Updating the examples to align with the latest codebase.