Merged PR 321: CAOS 0.8 observations

## Summary
* Remove the usecase-specific and agent-specific observation classes, replacing with a more flexible system
* Add configuration schemas to every observation class
* Add router, firewall, port, and application observation
* Re-shape the dict structure of observations to make it adhere to CAOS 0.8
* Change existing configs to use the new structure
* make host observation separate

## Test process
existing and new unit tests as well as ad hoc notebooks

## Checklist
- [ ] PR is linked to a **work item**
- [ ] **acceptance criteria** of linked ticket are met
- [ ] performed **self-review** of the code
- [ ] written **tests** for any new functionality added with this PR
- [ ] updated the **documentation** if this PR changes or adds functionality
- [ ] written/updated **design docs** if this PR implements new functionality
- [ ] updated the **change log**
- [ ] ran **pre-commit** checks for code style
- [ ] attended to any **TO-DOs** left in the code

Related work items: #2417

CHANGELOG.md

@@ -120,7 +120,7 @@ SessionManager.
 - Updated all tests to employ the `Network()` class for managing nodes and their connections, ensuring a consistent and structured approach to setting up network topologies in testing scenarios.
 - **ACLRule Wildcard Masking**: Updated the `ACLRule` class to support IP ranges using wildcard masking. This enhancement allows for more flexible and granular control over traffic filtering, enabling the specification of broader or more specific IP address ranges in ACL rules.
 - Updated `NetworkInterface` documentation to reflect the new NMNE capturing features and how to use them.
-- Integration of NMNE capturing functionality within the `NicObservation` class.
+- Integration of NMNE capturing functionality within the `NICObservation` class.
 - Changed blue action set to enable applying node scan, reset, start, and shutdown to every host in data manipulation scenario
 
 ### Removed