Content Plan Task--Document features list (architectural decisions & capabilities)

[JuLeeAtPlanet]

Describe the architecture to the extent it’s helpful to the user, and from the user’s perspective. Explain what capabilities we’re providing in the SDK & CLI. For example:

The SDK and CLI provide low-level clients to the core Planet APIs, with a one-to-one match between function calls and API endpoints. The SDK and CLI also provide:

• Retry logic
• Some pre-validation of inputs
• Helper functions for creating JSON request arrays
• Some state management
• Managing paged responses
• Download file checksum validation

[cholmes]

In content-planet.md under design docs.