Ensure correct spelling for names and 3rd party trademarks

[ckunki]

Please use the correct names "AWS SageMaker" and "Hugging Face" in the GitHub page readme.

PM has decided for "AI Lab" over "AI-Lab". So we need to update the term in all documents, e.g.

• user guide
• developer guide
• Jupyter notebooks
• messages generated by the implementation

Additional Acceptance Criteria

In order to find the correct and appropriate instructions for getting started the reader currently needs to select their favored edition of the AI Lab, which might not be obvious.

Proposed improvements:

• Add an explicit section header "Getting Started"
• Use more imperatives like "go here, do this"

Additionally, Exasol's in-house users proposed some more teasers about what I'll get there, i.e. some compelling hook like "a plenty of pre-configured Jupyter notebooks covering ...".