Easier to learn README.md

[OmarThinks]

Examples modified

Before:

• The example in the README.md was harder to understand.
• It discussed the a hard topic (using request body
  and query paramters at the same time)
• The example did not concentrate on what developers really came here for
  (getting validated data) inside the body of the function

After:

• The example README.md is easier to understand
• It takes baby steps towards the understanding of the package
  Example1: Query paramters only
  Example2: Request body only
  Example3: BOTH query paramters and request body
• The examples concentrate on what developers really need the most
  (using the data inside the request function)

[sonarcloud]

Kudos, SonarCloud Quality Gate passed!

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[bauerji]

Looks neat, thank you