TEST-0011 Add api client project (#373)

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## Description 💬
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## Motivation and Context 🥅
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## How has this been tested? 🧪
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- [ ] Local build ⚒️
- [ ] Local tests 🧪
- [ ] (optional) Local run and endpoint tested in swagger 🚀

## Screenshots (if appropriate) 💻

## Types of changes 🌊
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the boxes that apply: -->
- [ ] Bug fix (non-breaking change which fixes an issue)
- [ ] New feature (non-breaking change which adds functionality)
- [ ] Breaking change (fix or feature that would cause existing
functionality to not work as expected)

## Checklist ☑️

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that apply. -->
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here to help! -->
- [ ] The pull request title starts with the jira case number (when
applicable), e.g. "TEST-1234 Add some feature"
- [ ] The person responsible for following up on requested review
changes has been assigned to the pull request
- [ ] My code follows the code style of this project.
- [ ] My change requires a change to the documentation.
- [ ] I have updated the documentation accordingly.

## Highly optional checks, only use these if you have a reason to do so
✔️

- [ ] This PR changes the database so I have added the *create-diagram*
label to assist reviewers with a db diagram
- [ ] This PR changes platform or backend and I need others to be able
to test against these changes before merging to dev, so I have added the
*deploy-azure* label to deploy before merging the PR

## Checklist for the approver ✅

- [ ] I've checked the files view for spelling issues, code quality
warnings and similar
- [ ] I've waited until all checks have passed (green check/without
error)
- [ ] I've checked that only the intended files are changed

src/backend/.config/dotnet-tools.json

@@ -36,6 +36,13 @@
         "dotnet-outdated"
       ],
       "rollForward": false
+    },
+    "refitter": {
+      "version": "1.4.0",
+      "commands": [
+        "refitter"
+      ],
+      "rollForward": false
     }
   }
 }

src/backend/ApiClient/ApiClient.csproj

@@ -0,0 +1,19 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <OutputType>Exe</OutputType>
+    <TargetFramework>net9.0</TargetFramework>
+    <ImplicitUsings>enable</ImplicitUsings>
+    <Nullable>enable</Nullable>
+  </PropertyGroup>
+
+  <Target Name="RefitGenerator" BeforeTargets="build" Condition="'$(Configuration)' == 'Debug'">
+    <Warning Code="DSAMPLE002" Text="Generating API client with refitter" />
+    <Exec Command="dotnet refitter ..\WebApi\swagger.json --namespace WebApi.Client --output WebApiClient.cs" />
+  </Target>
+
+  <ItemGroup>
+    <PackageReference Include="Refit" Version="8.0.0" />
+  </ItemGroup>
+
+</Project>

src/backend/ApiClient/Program.cs

@@ -0,0 +1,5 @@
+using Refit;
+using WebApi.Client;
+
+var testApiClient = RestService.For<IExampleAPI>("https://localhost:44380");
+await testApiClient.Ping();