Add solution configuration and tooling

- .gitignore for .NET/Blazor project
- VS Code launch and task configurations
- Solution file (Duempelkas.slnx)
- NuGet configuration

.gitignore

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+## Ignore Visual Studio temporary files, build results, and
+## files generated by popular Visual Studio add-ons.
+##
+## See https://github.com/github/gitignore/blob/main/VisualStudio.gitignore
+
+# Build results
+[Dd]ebug/
+[Dd]ebugPublic/
+[Rr]elease/
+[Re]leases/
+x64/
+x86/
+[Ww]in32/
+[Aa]rm/
+[Aa]rm64/
+asms/
+bin/
+obj/
+publish/
+[Ll]og/
+[Ll]ogs/
+
+# Visual Studio 2015/2017/2019/2022 cache/options directory
+.vs/
+# Visual Studio Code
+# .vscode/
+!.vscode/settings.json
+!.vscode/tasks.json
+!.vscode/launch.json
+!.vscode/extensions.json
+*.code-workspace
+
+# User-specific files
+*.rsuser
+*.suo
+*.user
+*.userosscache
+*.sln.docstates
+
+# User-specific files (MonoDevelop/Xamarin Studio)
+*.userprefs
+
+# Mono auto generated files
+mono_crash.*
+
+# Nested folders
+[Dd]ebug/
+[Rr]elease/
+**/bin/
+**/obj/
+
+# NuGet Packages
+*.nupkg
+# NuGet Symbol Packages
+*.snupkg
+# The packages folder can be ignored because of Package Restore
+**/[Pp]ackages/*
+# except build/, which is used as an MSBuild target.
+!**/[Pp]ackages/build/
+# If using the NuGet Plugin for Visual Studio, it creates a NuGet.exe copy in the solutions directory
+# git should ignore it.
+# NuGet.exe
+# If using the NuGet Proto NuGet.dest.config file for Visual Studio, it creates a NuGet.dest.config copy in the solutions directory
+# git should ignore it.
+NuGet.dest.config
+# Project-specific NuGet config files
+# NuGet.config
+
+# BROWSER CLOUD EXPLORER
+.build/
+
+# Entity Framework 6 (deprecated)
+*.Cache
+!*.Directives.Cache
+
+# Entity Framework Core
+# Add this if you want to ignore the migrations folder
+# **/Migrations/
+
+# SQL Server files
+*.mdf
+*.ldf
+*.ndf
+
+# JetBrains Resharper temp files
+_ReSharper*/
+*.[Rr]e[Ss]harper.user
+
+# Mac OS X
+.DS_Store
+
+# User-specific files
+*.swp
+*~
+# IDE Support
+.idea/
+.vs/
+
+# Publishing tools
+node_modules/
+npm-debug.log*
+yarn-debug.log*
+yarn-error.log*
+.pnpm-debug.log*
+
+# Application Insights
+Microsoft.ApplicationInsights.SnapshotCollector.targets
+
+# Generated scripts
+_*/
+
+# Local Config
+*.local.config
+*.local.json
+appsettings.local.json
+
+# User secrets
+secrets.json
+.microsoft.dotnet.usersecrets/

.vscode/launch.json

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+{
+    "version": "0.2.0",
+    "configurations": [
+        {
+            "name": ".NET Core Launch (Desktop)",
+            "type": "coreclr",
+            "request": "launch",
+            "preLaunchTask": "build",
+            "program": "${workspaceFolder}/src/Duempelkas.Desktop/bin/Debug/net10.0/Duempelkas.Desktop.dll",
+            "args": [],
+            "cwd": "${workspaceFolder}/src/Duempelkas.Desktop",
+            "stopAtEntry": false,
+            "console": "internalConsole"
+        }
+    ]
+}

.vscode/tasks.json

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+{
+    "version": "2.0.0",
+    "tasks": [
+        {
+            "label": "build",
+            "command": "dotnet",
+            "type": "process",
+            "args": [
+                "build",
+                "${workspaceFolder}/Duempelkas.slnx"
+            ],
+            "problemMatcher": "$msCompile",
+            "group": {
+                "kind": "build",
+                "isDefault": true
+            },
+            "options": {
+                "statusbar": {
+                    "label": "$(tools) Build",
+                    "color": "#3a96ff",
+                    "detail": "Build the solution"
+                }
+            }
+        },
+        {
+            "label": "watch",
+            "command": "dotnet",
+            "type": "process",
+            "args": [
+                "watch",
+                "run",
+                "--project",
+                "${workspaceFolder}/src/Duempelkas.Desktop/Duempelkas.Desktop.csproj"
+            ],
+            "problemMatcher": "$msCompile",
+            "isBackground": true,
+            "options": {
+                "statusbar": {
+                    "label": "$(eye) Watch",
+                    "color": "#f7df06",
+                    "detail": "Watch and Run Desktop"
+                }
+            }
+        },
+        {
+            "label": "Git Sub Update",
+            "type": "shell",
+            "command": "git submodule update --init",
+            "options": {
+                "statusbar": {
+                    "hide": false,
+                    "label": "$(arrow-circle-down) Git Sub Update",
+                    "color": "#3a96ff"
+                }
+            }
+        },
+        {
+            "label": "Git Fetch + Pull Root + Submodule Init",
+            "type": "shell",
+            "command": "git fetch; git pull; git submodule update --init",
+            "options": {
+                "statusbar": {
+                    "hide": false,
+                    "label": "$(arrow-circle-down) Git Fetch/Pull + Submodules",
+                    "color": "#3a96ff"
+                }
+            }
+        }
+    ]
+}

Duempelkas.slnx

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+<Solution>
+  <Folder Name="/src/">
+    <Project Path="src/Duempelkas.App/Duempelkas.App.csproj" />
+    <Project Path="src/Duempelkas.Desktop/Duempelkas.Desktop.csproj" />
+    <Project Path="src/Duempelkas.Domain/Duempelkas.Domain.csproj" />
+    <Project Path="src/Duempelkas.Infrastructure/Duempelkas.Infrastructure.csproj" />
+  </Folder>
+  <Folder Name="/tests/">
+    <Project Path="tests/Duempelkas.Tests/Duempelkas.Tests.csproj" />
+  </Folder>
+</Solution>

nuget.config

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+<?xml version="1.0" encoding="utf-8"?>
+<configuration>
+  <packageSources>
+    <clear />
+    <add key="nuget.org" value="https://api.nuget.org/v3/index.json" />
+  </packageSources>
+</configuration>