* fix - supressed warning IL2072
Changed DropInDescriptor from Record to Class to be able to add the suggested DynamicallyAccesedMembers decorator.
* Add Unconfigure method to DropIn class and interface
The `DropIn` class in `DropIn.cs` now includes a new `Unconfigure` method. This method handles the unconfiguration process when a drop-in is deleted. It retrieves the `ILogger<DropIn>` and `IActivityRegistry` services from the `IServiceProvider`, removes the `SampleActivity` from the activity registry, and logs the outcome.
The `IDropIn` interface in `IDropIn.cs` has been updated to include the new `Unconfigure` method, ensuring that it is called when the drop-in is deleted.
Additional using directives have been added to `DropIn.cs` for `Elsa.Workflows`, and `Microsoft.Extensions.Logging`.
* Refactor AssemblyLoader to use memory stream for loading
Modified the `LoadPath` method in the `AssemblyLoader` class to load assemblies from a memory stream instead of directly from the file. This change prevents file locking issues by copying the file contents to a memory stream and then loading the assembly from this stream.
* Dispose packageReader after loading assembly
Ensure the packageReader is disposed of after loading the assembly from the memory stream. This change adds a call to `packageReader.Dispose()` to close the package reader and the associated `.nupkg` file, which helps in releasing resources and preventing potential file locks or memory leaks.
* Add drop-in unloading on file deletion
Updated DropInDirectoryMonitorHostedService to handle unloading of drop-ins when files are deleted. Added `_debouncedUnloader` and `_installedDropIns` fields. Modified constructor to initialize these fields. Updated `ExecuteAsync` to call `LoadDropInAssemblyAsync` initially and handle file deletion events. Added `OnDeleted` method to manage file deletions and invoke the debounced unloader. Enhanced `LoadDropInAssemblyAsync` to track loaded drop-ins. Introduced `UnloadDropInAssemblyAsync` to remove drop-ins on file deletion.
* Load assembly from MemoryStream instead of FileStream
Modified the assembly loading process to use a MemoryStream
instead of a FileStream. This change ensures that the
FileStream is properly closed before the assembly is loaded,
improving resource management and preventing potential file
access issues.
* Improve logging and error handling in DropIn services
Removed logging from DropIn.Unconfigure method and added
ILogger dependency to DropInDirectoryMonitorHostedService.
Updated csproj to include Microsoft.Extensions.Logging.Abstractions.
Enhanced error handling in UnloadDropInAssemblyAsync method.
Minor formatting improvements for readability.
