chore: update .gitignore for .NET 10 + React project

- Add comprehensive .NET/C# ignore patterns
- Add React/Vite/Node.js ignore patterns
- Remove obsolete Python-specific patterns
- Organize by technology stack

.gitignore

@@ -1,26 +1,90 @@
-# Python
+# .NET / C#
+## Build outputs
+bin/
+obj/
+out/
+
+## Visual Studio
+.vs/
+*.suo
+*.user
+*.userosscache
+*.sln.docstates
+*.userprefs
+
+## Visual Studio Code
+.vscode/
+!.vscode/settings.json
+!.vscode/tasks.json
+!.vscode/launch.json
+!.vscode/extensions.json
+
+## Rider / IntelliJ
+.idea/
+*.sln.iml
+
+## .NET Core
+project.lock.json
+project.fragment.lock.json
+artifacts/
+
+## ASP.NET Scaffolding
+ScaffoldingReadMe.txt
+
+## NuGet
+*.nupkg
+*.snupkg
+.nuget/
+packages/
+
+## Test Results
+TestResults/
+*.trx
+*.coverage
+*.coveragexml
+
+## BenchmarkDotNet
+BenchmarkDotNet.Artifacts/
+
+# Frontend (React/Vite)
+## Dependencies
+node_modules/
+.pnp
+.pnp.js
+
+## Build outputs
+dist/
+dist-ssr/
+build/
+*.local
+
+## Logs
+npm-debug.log*
+yarn-debug.log*
+yarn-error.log*
+.pnpm-debug.log*
+
+## TypeScript
+*.tsbuildinfo
+
+## Vite
+.vite/
+
+## ESLint
+.eslintcache
+
+## Stylelint
+.stylelintcache
+
+# Python (if any scripts)
 __pycache__/
 *.py[cod]
 *$py.class
 *.so
 .Python
-build/
-develop-eggs/
-dist/
-downloads/
-eggs/
-.eggs/
-lib/
-lib64/
-parts/
-sdist/
-var/
-wheels/
-share/python-wheels/
 *.egg-info/
 .installed.cfg
 *.egg
-MANIFEST
 
 # Virtual environments
 venv/
@@ -28,13 +92,12 @@ ENV/
 env/
 .venv
 
-# IDEs
-.vscode/
-.idea/
+# IDEs and Editors
 *.swp
 *.swo
 *~
 .DS_Store
+Thumbs.db
 
 # Environment variables
 .env
@@ -51,17 +114,9 @@ env/
 *.log
 logs/
 
-# Testing
-.coverage
-.pytest_cache/
+# Coverage
+coverage/
 htmlcov/
-.tox/
-.nox/
-
-# MyPy
-.mypy_cache/
-.dmypy.json
-dmypy.json
 
 # Terraform
 .terraform/
@@ -71,33 +126,6 @@ dmypy.json
 !.tfvars.example
 .terraform.lock.hcl
 
-# Node.js
-node_modules/
-npm-debug.log*
-yarn-debug.log*
-yarn-error.log*
-.pnpm-debug.log*
-
-# Build outputs
-dist/
-dist-ssr/
-build/
-*.local
-
-# TypeScript
-*.tsbuildinfo
-
-# Vite
-.vite/
-
-# Coverage
-coverage/
-
-# Temporary files
-*.tmp
-*.temp
-.cache/
-
 # Azure
 azure_credentials.json
 
@@ -106,5 +134,16 @@ azure_credentials.json
 *.key
 secrets/
 
-# OS
+# Temporary files
+*.tmp
+*.temp
+.cache/
+
+# OS files
+.DS_Store
 Thumbs.db
+desktop.ini
+
+# Misc
+*.bak
+*.orig