Remove unused IDE configuration files, devcontainer, and outdated launch profiles; add .idea and node_modules entries to .gitignore.

Author: maartenba

.idea/copilot.data.migration.agent.xml

@@ -99,6 +99,8 @@ Static assets, like favicons, can be placed in the `astro/public/` directory.
 
 ## ✍️ Authoring
 
+The `astro/` folder has been configured as a VS Code and WebStorm project, which you can open from that location to work on content.
+
 Content can be authored in Markdown, in a `.md` or `.mdx` file. The Starlight documentation has some guidance on Markdown syntax, components, and more:
 
 * [Authoring Content in Markdown](https://starlight.astro.build/guides/authoring-content/)

.idea/copilot.data.migration.edit.xml

@@ -0,0 +1,70 @@
+# Astro build output
+astro/dist/
+astro/root/
+server/src/Docs.Web/wwwroot/
+
+# generated types
+astro/.astro/
+
+# dependencies
+node_modules/
+
+# logs
+npm-debug.log*
+yarn-debug.log*
+yarn-error.log*
+pnpm-debug.log*
+
+
+# environment variables
+.env
+.env.production
+
+# macOS-specific files
+.DS_Store
+.vscode/settings.json
+*.iml
+
+# Agents and assistants
+.opencode/
+opencode.json
+.idea/**/copilot.data.migration.*.xml
+
+# .NET
+*.user
+*.suo
+*.userosscache
+*.sln.docstates
+[Bb]in/
+[Oo]bj/
+[Ll]og/
+[Ll]ogs/
+.vs/
+*.nupkg
+*.snupkg
+project.lock.json
+project.fragment.lock.json
+artifacts/
+
+# Rider
+.idea/**/workspace.xml
+.idea/**/tasks.xml
+.idea/**/usage.statistics.xml
+.idea/**/dictionaries
+.idea/**/shelf
+
+# User-specific files
+*.rsuser
+
+# JetBrains Rider
+*.sln.iml
+
+# ASP.NET Scaffolding
+ScaffoldingReadMe.txt
+
+# Windows
+Thumbs.db
+ehthumbs.db
+
+# Azure Functions
+local.settings.json