Moved bulk of Python: Functions info into separate entries

[Dusch4593]

Description

Per our target keyword efforts.

Type of Change

• Adding a new entry
• Editing an existing entry (fixing a typo, bug, issues, etc)

Checklist

• All writings are my own.
• My entry follows the Codecademy Docs style guide.
• My changes generate no new warnings.
• I have performed a self-review of my own writing and code.
• I have checked my entry and corrected any misspellings.
• I have made corresponding changes to the documentation if needed.
• I have confirmed my changes are not being pushed from my forked main branch.
• I have confirmed that I'm pushing from a new branch named after the changes I'm making.
• Under "Development" on the right, I have linked any issues that are relevant to this PR (write "Closes # in the "Description" above).

[SSwiniarski]

@Dusch4593, I reviewed this and left a few comments.

[Dusch4593]

@SSwiniarski I'll incorporate the rest of your suggestions locally and push from there. 😄

[Dusch4593]

@SSwiniarski Finished with incorporating your suggestions.

[SSwiniarski]

@Dusch4593 LGTM! 👍

[KTom101]

@Dusch4593 I've added some feedback to this.

[Dusch4593]

Thanks for your feedback @KTom101 🙏🏻 I'm going to implement the rest of it locally and push from there 😃

[Dusch4593]

@KTom101 I believe all of the comments/suggestions were addressed?

[KTom101]

@Dusch4593 Yep, they were. Thanks!

[Dusch4593]

Thank you everyone! @KTom101 @SSwiniarski! The edits and entries will be shown below.

• Functions: https://www.codecademy.com/resources/docs/python/functions
• Anonymous Functions: https://www.codecademy.com/resources/docs/python/functions/anonymous-functions
• Arguments/Parameters: https://www.codecademy.com/resources/docs/python/functions/arguments-parameters
• Keywords: https://www.codecademy.com/resources/docs/python/keywords
• Lambda: https://www.codecademy.com/resources/docs/python/keywords/lambda
• Recursion: https://www.codecademy.com/resources/docs/python/recursion