Create other base Entity schemas

[jhodapp]

Create the follow other Entity schemas needed for core platform data model functionality and relationships to work correctly:

• Coaches_Coachees
• Coaching_Sessions
• Notes
• Actions
• Agreements
• Overarching_Goals

Also make sure that all existing entities are up to date with the latest DB schema definition:

• Users
• Organizations

[jhodapp]

Still in progress, but mostly complete with the work from PR #30.

Users and Organizations still need to be updated to match the new schema.