Provide a minimal introduction to Anoma for developers, linking to underlying concepts, and addressing the following questions (taken from this comment):

• What is Anoma?
• What is a resource?
• What is an action?
• What is a transaction?
• What is an intent?
• What is an Anoma app?
• What are the components of an app?
• What is a resource logic function?
• What is a transaction function?
• What is a projection function?