Update Index for performance

Update migration in place. Remove unneeded items from index

Add Update for existing records

Implemented GetMachineReference for NaturalStateEngine

Added index for MetadataEntries on Key Include Value for joins

Vary package dependencies in Ninject adapter

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Add MachineAlreadyExistsException and resolve race conditions in tests

✨ Add Ninject IoC adapter

- Add Ninject adapter
- Support some simplified connector registration cases
- Add tests for ninject adapter
- Support tail calls into the same machine in entry actions
- Add test for tail call support

✨ Creates REstate.Concurrency.Primitives

- Adds the new project
- Updates the Sempahore example to use the library instead of manually crafting a machine

✨ Add EntityFramework Core support

- Redesign scenarios into templates to allow easy addition of providers
- Bulk Create returns state machines now instead of void
- Add scenarios for deletion and bulk creation
- Provider tests have to be commented out to run now except in-memory EF core providers