build: rename repository folder ChatTwo to HellionChat

Repository folder, csproj, solution and all CI/build paths now use
the consolidated HellionChat name.

- ChatTwo/ → HellionChat/ (git mv preserves history with --follow)
- ChatTwo.csproj → HellionChat.csproj
- ChatTwo.sln → HellionChat.sln; obsolete Tests project entry removed
  (private/untracked sandbox)
- AssemblyInfo.cs InternalsVisibleTo for ChatTwo.Tests removed
  (file emptied; can be repopulated when actual tests land)
- repo.json and yaml image URLs updated (ChatTwo/images/ → HellionChat/images/)
- .github/workflows/{build,codeql,release}.yml csproj paths
- .github/dependabot.yml directory path

Functional behavior unchanged.

HellionChat/HellionChat.csproj

@@ -0,0 +1,73 @@
+<Project Sdk="Dalamud.NET.Sdk/15.0.0">
+    <PropertyGroup>
+        <!-- Hellion Chat versioning runs separately from upstream Chat 2.
+             0.1.0 is our bootstrap release; the underlying Chat 2 base is
+             called out in the yaml changelog so users can see what it
+             derives from. -->
+        <Version>0.6.1</Version>
+        <ImplicitUsings>enable</ImplicitUsings>
+        <!-- v1.0.0 standalone cut — both AssemblyName and RootNamespace
+             are HellionChat. The plugin no longer maintains source-level
+             cherry-pick compatibility with upstream Infiziert90/ChatTwo;
+             upstream changes are integrated manually if at all. -->
+        <AssemblyName>HellionChat</AssemblyName>
+        <RootNamespace>HellionChat</RootNamespace>
+    </PropertyGroup>
+
+    <ItemGroup>
+        <PackageReference Include="MessagePack" Version="3.1.4" />
+        <PackageReference Include="Microsoft.Data.Sqlite" Version="10.0.7" />
+        <PackageReference Include="morelinq" Version="4.4.0" />
+        <PackageReference Include="Pidgin" Version="3.3.0" />
+        <PackageReference Include="SixLabors.ImageSharp" Version="3.1.12" />
+    </ItemGroup>
+
+    <ItemGroup>
+        <Compile Update="Resources\Language.Designer.cs">
+            <DesignTime>True</DesignTime>
+            <AutoGen>True</AutoGen>
+            <DependentUpon>Language.resx</DependentUpon>
+        </Compile>
+    </ItemGroup>
+
+    <ItemGroup>
+        <EmbeddedResource Update="Resources\Language.resx">
+            <Generator>ResXFileCodeGenerator</Generator>
+            <LastGenOutput>Language.Designer.cs</LastGenOutput>
+        </EmbeddedResource>
+    </ItemGroup>
+
+    <!-- HellionChat — Hellion-specific resource bundle (HellionStrings.resx
+         + HellionStrings.<lang>.resx) is picked up automatically by the SDK
+         default include. Designer.cs is hand-maintained, no auto-gen needed. -->
+
+    <!-- Bundled Hellion font (Exo 2, OFL-1.1). Embedded as a manifest
+         resource with a fixed LogicalName so FontManager can pull the
+         bytes back at runtime via AddFontFromMemory. The OFL license
+         text travels with it inside the assembly to satisfy the
+         "license must be distributed with the font" clause. -->
+    <ItemGroup>
+        <EmbeddedResource Include="Resources\HellionFont.ttf">
+            <LogicalName>HellionFont.ttf</LogicalName>
+        </EmbeddedResource>
+        <EmbeddedResource Include="Resources\HellionFont-OFL.txt">
+            <LogicalName>HellionFont-OFL.txt</LogicalName>
+        </EmbeddedResource>
+    </ItemGroup>
+
+
+    <!-- Plugin icon. Copy images/* into the build output so Dalamud
+         finds the icon next to the DLL, and let the SDK default
+         DalamudPackager pipeline include the same path in the
+         release ZIP. Earlier we shipped a custom DalamudPackager
+         targets override that explicitly set HandleImages and
+         ImagesPath; that override conflicted with the SDK 15
+         default and the resulting manifest carried no IconUrl.
+         Removed in v0.5.2. -->
+    <ItemGroup>
+        <None Include="images\**">
+            <CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
+        </None>
+    </ItemGroup>
+
+</Project>