DSC_lite: Document tradeoffs between generic DSC and current DSC

This work should impact DSC_Lite README

Existing DSC type wrappers

• For Microsoft released / community resources requires Puppet to issue new modules with new vendored content
• For custom resources, requires following a separate build procedure involving Ruby tooling and releasing custom module internally (does allow for unnecessary resources to be stripped from custom module)
• Type wrappers are specifically versioned with their corresponding DSC resource counterparts - no possibility for a manifest definition to mismatch against the actual DSC resource. All content vendored together makes initial consumption model for users simple.
• Module is fairly heavyweight for pluginsync, especially given it will generally be synced to Linux hosts where it cannot run
• No puppet resource support
• No property by property reporting - DSC doesn't differentiate between properties and parameters like Puppet does, which makes it difficult
• Type wrappers provide up-front parse-time validation based on MOF schemas, so no need to call into DSC runtime to verify type checks (i.e. string, int, etc)
• No ability to support PowerShell class based resources currently
• No ability to support composite resources
• PE console reporting specificies individual resource types / provides grouping and filtering over them

New DSC_lite generic wrapper

• No parse-time validation performed by Puppet - must defer validation until runtime when DSC resources are executed
• Consume any resource that is available on the host - no need to use vendored content
• Can use Puppet more granularly to distribute DSC resources if desired
• Can use multiple versions of same resource easily on a resource-by-resource basis
• Console reporting only shows dsc, and not any specific dsc resource types - work to investigate this further in MODULES-5970
• The dsc resource properties hash is conceptually more similar to PowerShell DSC resource definition - there are also no dsc_ prefixes necessary for DSC properties
• Extremely lightweight module given it vendors no content - includes approximately 10 files