Update examples to match template.

### 📝 Description of the feature

Update the examples so the header levels and text match ``/doc/examples/template.py``

### 💡 Steps for implementing the feature

Update the examples in ``/examples/``:

- [x] Task 1: ``aedt_general/components/*`` (PR #292)
- [ ] Task 2: ``aedt_general/modeler/*``
- [ ] Task 3: ``configuration_files.py``
- [ ] Task 4: ``optimetrics.py``
- [ ] Task 5: ``high_frequency/antenna/interfaces/*``
- [ ] Task 6: ``high_frequency/antenna/large_scenarios/*``
- [x] Task 7: ``high_frequency/antenna/*``
- [ ] Task 8: ``high_frequency/emc/*``
- [ ] Task 9: ``high_frequency/layout/power_integrity/*``
- [ ] Task 10: ``high_frequency/layout/signal_integrity/*``
- [ ] Task 11: ``high_frequency/layout/gui_manipulation.py``
- [ ] Task 12: ``high_frequency/multiphysics/*``
- [ ] Task 13: ``high_frequency/radiofrequency_mmwave/*``
- [ ] Task 14: ``low_frequency/general/*``
- [x] Task 15: ``low_frequency/motor/aedt_motor/*``

### 🔗 Useful links and references

See tasks associated with this issue.