Add how to consolidate to documentation

[jlvandenhout]

Description of change

• Move the existing consolidation code examples to Accounts and Addresses.
• Add a consolidation example for Python.
• Add a corresponding section to the documentation.

Links to any relevant issues

fixes #598

Type of change

• Documentation Fix

How the change has been tested

• Tested the moved Rust example.
• Tested the newly created Python example.
• Tested the adjusted Node.js example.
• Built the Wiki locally.

Change checklist

Tick the boxes that are relevant to your changes, and delete any items that are not.

• I have followed the contribution guidelines for this project
• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation