Partial<T> for CommandResult<T> (#5482)

* Example of how a partial success/failure command result would look.

* Fixed code.

* Added Validator and ValidationResult

* Moved errors into their own files.

* Fixing tests

* fixed import.

* Forgot mock error.

src/Core/AdminConsole/Errors/Error.cs

@@ -0,0 +1,3 @@
+namespace Bit.Core.AdminConsole.Errors;
+
+public record Error<T>(string Message, T ErroredValue);

src/Core/AdminConsole/Errors/InsufficientPermissionsError.cs

@@ -0,0 +1,11 @@
+namespace Bit.Core.AdminConsole.Errors;
+
+public record InsufficientPermissionsError<T>(string Message, T ErroredValue) : Error<T>(Message, ErroredValue)
+{
+    public const string Code = "Insufficient Permissions";
+
+    public InsufficientPermissionsError(T ErroredValue) : this(Code, ErroredValue)
+    {
+
+    }
+}

src/Core/AdminConsole/Errors/RecordNotFoundError.cs

@@ -0,0 +1,11 @@
+namespace Bit.Core.AdminConsole.Errors;
+
+public record RecordNotFoundError<T>(string Message, T ErroredValue) : Error<T>(Message, ErroredValue)
+{
+    public const string Code = "Record Not Found";
+
+    public RecordNotFoundError(T ErroredValue) : this(Code, ErroredValue)
+    {
+
+    }
+}

src/Core/AdminConsole/Shared/Validation/IValidator.cs

@@ -0,0 +1,6 @@
+namespace Bit.Core.AdminConsole.Shared.Validation;
+
+public interface IValidator<T>
+{
+    public Task<ValidationResult<T>> ValidateAsync(T value);
+}

src/Core/AdminConsole/Shared/Validation/ValidationResult.cs

@@ -0,0 +1,15 @@
+using Bit.Core.AdminConsole.Errors;
+
+namespace Bit.Core.AdminConsole.Shared.Validation;
+
+public abstract record ValidationResult<T>;
+
+public record Valid<T> : ValidationResult<T>
+{
+    public T Value { get; init; }
+}
+
+public record Invalid<T> : ValidationResult<T>
+{
+    public IEnumerable<Error<T>> Errors { get; init; }
+}