feat: Implement user permission checks and manual payment functionalities

- Added CheckUserPermissionQuery and CheckUserPermissionQueryHandler for permission validation.
- Introduced GetUserRolesQuery and GetUserRolesQueryHandler to retrieve user roles.
- Created IPermissionService interface and its implementation in PermissionService.
- Defined permission and role constants in PermissionDefinitions.
- Developed SetDefaultVatPercentageCommand and its handler for VAT configuration.
- Implemented GetCurrentVatPercentageQuery and handler to fetch current VAT settings.
- Added manual payment commands: CreateManualPayment, ApproveManualPayment, and RejectManualPayment with respective handlers and validators.
- Created GetManualPaymentsQuery and handler for retrieving manual payment records.
- Integrated gRPC services for manual payments with appropriate permission checks.
- Established Protobuf definitions for manual payment operations and metadata.

src/Protobufs/BackOffice.BFF.ManualPayment.Protobuf/BackOffice.BFF.ManualPayment.Protobuf.csproj

@@ -0,0 +1,36 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <TargetFramework>net9.0</TargetFramework>
+    <ImplicitUsings>enable</ImplicitUsings>
+    <Nullable>enable</Nullable>
+    <Version>0.0.1</Version>
+    <DebugType>None</DebugType>
+    <DebugSymbols>False</DebugSymbols>
+    <GeneratePackageOnBuild>False</GeneratePackageOnBuild>
+    <PackageId>Foursat.BackOffice.BFF.ManualPayment.Protobuf</PackageId>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <PackageReference Include="Google.Protobuf" Version="3.23.3" />
+    <PackageReference Include="Grpc.Core.Api" Version="2.54.0" />
+    <PackageReference Include="Grpc.Tools" Version="2.72.0">
+      <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
+      <PrivateAssets>all</PrivateAssets>
+    </PackageReference>
+    <PackageReference Include="FluentValidation.DependencyInjectionExtensions" Version="11.2.2" />
+    <PackageReference Include="Google.Api.CommonProtos" Version="2.10.0" />
+  </ItemGroup>
+
+  <ItemGroup>
+    <Protobuf Include="Protos\manualpayment.proto"
+              ProtoRoot="Protos\"
+              GrpcServices="Both"
+              AdditionalImportDirs="..\BackOffice.BFF.Common.Protobuf\Protos" />
+  </ItemGroup>
+
+  <ItemGroup>
+    <ProjectReference Include="..\BackOffice.BFF.Common.Protobuf\BackOffice.BFF.Common.Protobuf.csproj" />
+  </ItemGroup>
+
+</Project>