Remove .NET-isms from language-neutral docs

[davidfowl]

Problem

Several pages and sidebar labels use .NET-specific terminology in contexts that should be language-neutral. A TypeScript/JavaScript developer navigating the docs encounters NuGet packages, .csproj files, dotnet CLI commands, and C#-only concepts like "service defaults" presented as universal Aspire features.

Sidebar labels that are misleadingly generic

Current label	Problem	Suggestion
Aspire SDK	Page is 100% about Aspire.AppHost.Sdk NuGet + .csproj	Rename to "Aspire SDK (C#)" or scope under C# AppHost
Aspire templates	Page is about .NET dotnet new templates	Rename to "Aspire templates (C#)" or scope similarly
Service defaults	.csproj project with AddServiceDefaults() — C#-only	Clarify as C#-specific in label or page intro

Content issues

NuGet references in multi-language AppHost page

get-started/app-host.mdx — The Python, JavaScript, Go, and Java pivots mention "NuGet package" which is confusing for non-.NET developers. These are packages for the AppHost, not the target language.

Service defaults in Fundamentals

fundamentals/service-defaults.mdx, fundamentals/health-checks.mdx — Presented as universal concepts but documented entirely with C# code (AddServiceDefaults(), MapDefaultEndpoints(), .csproj projects).

.csproj in getting started

get-started/add-aspire-existing-app.mdx — Assumes all projects are .NET with .csproj file trees.

dotnet run in pipelines

get-started/pipelines.mdx — Generic deployment pipeline page uses dotnet run --project examples.

Glossary defines "Projects" as .NET only

get-started/glossary.mdx — "Projects" defined as ".NET applications, services, APIs" — excludes Python/JS/Go/Java.

C# DevKit in VS Code extension page

get-started/aspire-vscode-extension.mdx — C# DevKit mentioned generically, not scoped to C# AppHost context.

What is NOT a problem (already fixed)

• Prerequisites page — has C#/TypeScript pivots ✅
• First-app page — has C#/Python/JavaScript pivots ✅
• Install CLI page — no .NET dependency mentioned ✅
• Landing page — language-neutral ✅