* Implement Alteration types and engine
* Implement Alteration APIs
* Refactor activity work item with support for activity input
* Serialize scheduled activities as part of workflow state
* Add signal to schedule child activity
* Implement stores for plans and jobs
* Add EF Core provider
* Add Retry endpoint
* Keep root context as always active. The root context is the workflow execution context and contains persistent variable state
* Regenerate EF Core migrations
* Handle orphaned activity execution contexts
* Refactor workflow execution factory
* Enable configuring Jint from Program
* Update ModifyVariable alteration with support for type deserialization
* Use ShortGuid for identity
* Cleanup WorkflowServer host
* Refactor HTTP route table population
* Update workflow definition EF store to use abstract IWorkflowInstanceStore
This decoupling is necessary, because the application might not be using EF Core, but e.g. Elasticsearch
* Move workflow state persistence to the default workflow runtime feature
* Update JS handler to provide access to variables during trigger indexing
* Configure Proto.Actor runtime with different workflow pipeline
* Add sample using Proto.Actor runtime
* Replace BookmarkGrain with DB based persistence
* Incremental work on WorkflowStateSerializer
* Update Flow HTTP Request activity to default to Done outcome
* Fix reference handling
* Fix polymorphic object converter
* Add comments
* Add support for registering type alias during DI setup via options
* Fix trigger and bookmark payload persistence
* Update sample model
* Add support for custom dictionary types
* Split general serializer options provider into focused serializer services
* Formatting
* Update migrations
* Incremental work on samples
* Rename HTTP middleware and update samples
* Rename HTTP Activities to Workflows
* Automatically register core activities when adding Elsa
* Fix feature registration bug
* Add default auth feature
* Make activity serializer more flexible
* Bump designer version
* Add workflow server + designer samples
* Simplify EntityFrameworkCore projects
* Update solution
* Add Sqlite package references to ensure the correct version is used
* Update sample project with EF Core
* Update EF extensions
* Add server + designer sample project
* Cleanup AllInOne project and add some XML comments
* Rename ci.yml and add CI for Docker file
* Delete DefaultWorkflowInvoker.cs
* Incremental work
* Refactor runtime
* Implement workflow state store + bookmark store
* Cleanup
* Update migrations
* Move store abstractions to management and runtime projects
* Consolidate persistence providers into single package
* Generate migrations
* Regenerate migrations
* Fix DI of memory stores
* Update migrations
* Refactor definition reference due to unserializable record
* Update web server bundle to use EF core by default
* Update Bookmark.cs
Fixes System Text Json deserialization
* Initial working grain
* Incremental work on actor bookmark management & resuming wokflows
* Upgrade Proto Actor package references
* Fix lifetime of actors
* Implement bookmark and resumption
* Update Program.cs
* Update bookmark event publishing
* Refactor proto actor features API
* Implement snapshotting
* Update snapshotting
* Add in-memory provider and use it by default
* Update server bundle to use proto actor sqlite persistence by default
