chore: add hrynco common library solution

- add the standalone HrynCo.Common solution and projects
- include the shared common library source and tests
- add package metadata and a repo gitignore

HrynCo.Common/HrynCo.Common.csproj

@@ -0,0 +1,35 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+    <PropertyGroup>
+        <TargetFramework>net10.0</TargetFramework>
+        <ImplicitUsings>enable</ImplicitUsings>
+        <Nullable>enable</Nullable>
+        <RootNamespace>HrynCo.Common</RootNamespace>
+        <PackageId>HrynCo.Common</PackageId>
+        <Authors>HrynCo</Authors>
+        <Description>Shared common utilities for HrynCo applications.</Description>
+        <PackageTags>hrynco common utilities caching configuration healthchecks security</PackageTags>
+        <RepositoryType>git</RepositoryType>
+        <RepositoryUrl>https://gitea.grynco.com.ua/hrynco/hrynco-common.git</RepositoryUrl>
+        <PackageReadmeFile>README.md</PackageReadmeFile>
+    </PropertyGroup>
+
+    <ItemGroup>
+        <PackageReference Include="Microsoft.AspNetCore.Hosting.Abstractions" Version="2.3.0"/>
+        <PackageReference Include="Microsoft.Extensions.Caching.Memory" Version="9.0.6"/>
+        <PackageReference Include="Microsoft.Extensions.Configuration" Version="9.0.6"/>
+        <PackageReference Include="Microsoft.Extensions.Configuration.EnvironmentVariables" Version="9.0.6"/>
+        <PackageReference Include="Microsoft.Extensions.Configuration.FileExtensions" Version="9.0.6"/>
+        <PackageReference Include="Microsoft.Extensions.Configuration.Json" Version="9.0.6"/>
+        <PackageReference Include="Microsoft.Extensions.Diagnostics.HealthChecks" Version="9.0.5"/>
+    </ItemGroup>
+
+    <ItemGroup>
+        <PackageReference Include="Serilog" Version="4.2.0"/>
+    </ItemGroup>
+
+    <ItemGroup>
+        <None Include="README.md" Pack="true" PackagePath=""/>
+    </ItemGroup>
+
+</Project>