[Feat] Basic functionality

[thedist]

Describe the feature
Features planned for initial testing of the module

• Documentation for users to create credentials for a Google App
• OAuth flow to give access to the module to access the sheets
• Retrieve sheet data from a list of comma-separated sheets in the modules config
• Instance Variables (per cell? testing will be needed to determine scalability when working with large sheets)
• Set a value (or no value) to a specified cell
• Increment/Decrement a numerical value in a cell
• Move the contents of one cell to another (options to overwrite, or swap cells)
• Feedback for if a cells value meets a certain criteria (scales better than instance variables for every cell)