feat: Add gitignore template

.gitignore

@@ -0,0 +1,111 @@
+# .gitignore for C# / ASP.NET Core with JetBrains Rider/ReSharper
+
+# ##############################################################################
+# ## Purpose: This file tells Git which files and folders to ignore in a      ##
+# ## project. It's configured for C#/.NET projects and JetBrains tools.       ##
+# ##############################################################################
+
+# ####################
+# ## JetBrains IDEs ##
+# ####################
+# Covers project settings, caches, and user-specific configurations for Rider,
+# ReSharper, and other IntelliJ-platform IDEs.
+
+# Project-specific settings (shared ones are typically in .idea/ and checked in)
+.idea/
+
+# User-specific settings
+*.sln.DotSettings.user
+*.suo
+
+# ReSharper and Rider cache files
+_ReSharper*/
+_Rider*/
+
+# #################################
+# ## Visual Studio / .NET Core ##
+# #################################
+
+# User-specific files generated by Visual Studio
+*.user
+*.vs/
+
+# Build results
+[Bb]in/
+[Oo]bj/
+
+# Publish results
+[Pp]ublish/
+**/publish/
+
+# NuGet packages folder (for older packages.config style)
+packages/
+
+# NuGet symbol packages
+*.nupkg
+# ...but not in a 'packages' directory, which is for source code.
+!**/packages/*.nupkg
+
+# Test results
+TestResults/
+*.trx
+
+# #################################################
+# ## Secrets & Environment-Specific Config Files ##
+# #################################################
+# IMPORTANT: Never commit secrets or credentials.
+
+# User secrets file (stores secrets locally, not in the project directory)
+# This is a good reminder, though the file is typically outside the repo.
+secrets.json
+
+# Ignore all environment-specific appsettings, but KEEP the base and Production.
+# This prevents developers from accidentally committing local dev connection strings.
+appsettings.*.json
+!appsettings.json
+!appsettings.Production.json
+
+# Environment variable files
+.env
+
+# #################################
+# ## Web & Client-Side Assets    ##
+# #################################
+# Ignore folders for client-side package managers.
+
+node_modules/
+bower_components/
+wwwroot/lib/
+
+# #################################
+# ## Miscellaneous               ##
+# #################################
+
+# Log files
+*.log
+logs/
+
+# IIS Express configuration file
+applicationhost.config
+
+# Files generated by Visual Studio testing
+*.mdf
+*.ldf
+
+# Visual Studio code coverage results
+*.coverage
+*.coveragexml
+
+# #################################
+# ## OS-generated files          ##
+# #################################
+
+# macOS
+.DS_Store
+.AppleDouble
+.LSOverride
+
+# Windows
+Thumbs.db
+ehthumbs.db
+Desktop.ini