Add a variant of the CDK speedrun that uses the PokeAPI

[avaidyanatha]

Main Changes

• We are slowly deprecating the ExchangeRates API out of our docs due to its requirement of an API key and other general usability issues. Additionally, the PokeAPI is a lot simpler and allows for explaining concepts in a more inclusive fashion.
• Additionally, I feel like the initial speedrun doc left out a lot of opportunities for learning in the path of being speedy. I've reintroduced some learning opportunities for the reader without sacrificing too much of the brevity.

Secondary Changes

• Added the necessary helper files in the airbyte-cdk docs directory

Notes

• Once we feel confident in this one, we can deprecate the old speedrun. I've given it a test run, so everything should work as expected.

[marcosmarxm]

@avaidyanatha can you apply ./gradlew format or handle the EOL is the building? Overall LGTM!