chore(Editor): add mentions example

Author: georgedautov

editor/Mentions/.gitignore

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+# Ignore the built js file for consistent setup
+index.bundle.js

editor/Mentions/EditorMentions.sln

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+
+Microsoft Visual Studio Solution File, Format Version 12.00
+# Visual Studio Version 18
+VisualStudioVersion = 18.3.11222.16
+MinimumVisualStudioVersion = 10.0.40219.1
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "EditorMentions", "EditorMentions\EditorMentions.csproj", "{1E746FCD-01B9-49AC-BD89-E5C0C39B65A5}"
+EndProject
+Global
+	GlobalSection(SolutionConfigurationPlatforms) = preSolution
+		Debug|Any CPU = Debug|Any CPU
+		Release|Any CPU = Release|Any CPU
+	EndGlobalSection
+	GlobalSection(ProjectConfigurationPlatforms) = postSolution
+		{1E746FCD-01B9-49AC-BD89-E5C0C39B65A5}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{1E746FCD-01B9-49AC-BD89-E5C0C39B65A5}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{1E746FCD-01B9-49AC-BD89-E5C0C39B65A5}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{1E746FCD-01B9-49AC-BD89-E5C0C39B65A5}.Release|Any CPU.Build.0 = Release|Any CPU
+	EndGlobalSection
+	GlobalSection(SolutionProperties) = preSolution
+		HideSolutionNode = FALSE
+	EndGlobalSection
+	GlobalSection(ExtensibilityGlobals) = postSolution
+		SolutionGuid = {9DE58732-38AD-4571-8186-A058A5BCE359}
+	EndGlobalSection
+EndGlobal

editor/Mentions/EditorMentions/App.razor

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+<Router AppAssembly="@typeof(App).Assembly">
+    <Found Context="routeData">
+        <RouteView RouteData="@routeData" DefaultLayout="@typeof(MainLayout)" />
+        <FocusOnNavigate RouteData="@routeData" Selector="h1" />
+    </Found>
+    <NotFound>
+        <PageTitle>Not found</PageTitle>
+        <LayoutView Layout="@typeof(MainLayout)">
+            <p role="alert">Sorry, there's nothing at this address.</p>
+        </LayoutView>
+    </NotFound>
+</Router>

editor/Mentions/EditorMentions/EditorMentions.csproj

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+<Project Sdk="Microsoft.NET.Sdk.Web">
+
+  <PropertyGroup>
+    <TargetFramework>net8.0</TargetFramework>
+    <Nullable>enable</Nullable>
+    <ImplicitUsings>enable</ImplicitUsings>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <PackageReference Include="Telerik.UI.for.Blazor" />
+  </ItemGroup>
+</Project>

editor/Mentions/EditorMentions/Models/Mention.cs

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+namespace EditorMentions.Models
+{
+    public class Mention
+    {
+        public string Id { get; set; }
+        public string Name { get; set; }
+        public string Email { get; set; }
+    }
+}