Automatically starting scans

**Additional context**
Whenever we need to start a scan (vulnerability or secrets), there needs to be a sequence of steps that need to be performed, either through an API, or through the UI

**Is your feature request related to a problem? Please describe.**

**Describe the solution you'd like**
There should be a way to automatically start & schedule a scan -
- If the sensor is deployed, it automatically starts and schedules a scan on the host & the containers on the host.
- If a registry is added, there should be a way to automatically start & schedule scan on the latest tags of the images that are added to the registry
- If a cloud account is added, there should be a default set of scans we start and schedule

**Describe alternatives you've considered**
A clear and concise description of any alternative solutions or features you've considered.

**Components/Services**

- [ ] UI/Frontend
- [x] API/Backend
- [ ] Agent
- [ ] Deployment/YAMLs
- [ ] CI/CD Integration
- [ ] Other (specify)

**Additional context**
Add any other context or screenshots about the feature request here.