Implement different ASFF fixing mechanism and other improvements

[gabrielsoltz]

• Implement different ASFF fixing mechanisms, as some sources are not correctly generating the outputs. For example, fixing Region when it is not present and fixing Resource Type when it is incorrect.
• Some improvements in error handling
• For some time already, AWS Security Hub has added Tags to the affected resources 🥳 The code will check if the Tags are present as part of the Resources Details, and avoid fetching the API if they are already there.
• New Resource Type: Container, for now, we check if there is a policy attached
• Improved README with examples on how to use MetaHub with PowerPipe, Trivy, and Prowler