docs: add NuGet package info to READMEs and fix copilot-instructions structure

.github/copilot-instructions.md

@@ -15,7 +15,9 @@ TCSystemCS is a collection of reusable .NET libraries written in **C# 14** targe
 ├── MetaDataDB/       → TCSystem.MetaDataDB (SQLite metadata storage)
 │   └── Tests/        → TCSystem.MetaDataDB.Tests (NUnit)
 ├── Thread/           → TCSystem.Thread (worker thread, async helpers)
+│   └── Tests/        → TCSystem.Thread.Tests (NUnit)
 ├── Util/             → TCSystem.Util (extension methods, utilities)
+│   └── Tests/        → TCSystem.Util.Tests (NUnit)
 └── Tools/
     ├── DBConverter/  → Console app – database schema converter
     └── TakeoutReader/→ Console app – Google Takeout importer

Gps/README.md

@@ -1,7 +1,15 @@
 # TCSystem.Gps
 
+[![NuGet](https://img.shields.io/nuget/v/TCSystem.Gps.svg)](https://www.nuget.org/packages/TCSystem.Gps/)
+
 Reader for GPS data from Google Takeout location history files (`records.json`). Uses `System.Text.Json` with async streaming for efficient processing of large files.
 
+## Installation
+
+```bash
+dotnet add package TCSystem.Gps
+```
+
 ## Features
 
 - Async streaming reader for Google Takeout `records.json`

Logging/README.md

@@ -1,7 +1,15 @@
 # TCSystem.Logging
 
+[![NuGet](https://img.shields.io/nuget/v/TCSystem.Logging.svg)](https://www.nuget.org/packages/TCSystem.Logging/)
+
 Wraps [Serilog](https://serilog.net/) behind an abstract `Logger` class where debug logging is **not compiled** into your code when building in Release mode (using `[Conditional("DEBUG")]`).
 
+## Installation
+
+```bash
+dotnet add package TCSystem.Logging
+```
+
 ## Features
 
 - Abstract `Logger` class with conditional debug logging

MetaData/README.md

@@ -1,7 +1,15 @@
 # TCSystem.MetaData
 
+[![NuGet](https://img.shields.io/nuget/v/TCSystem.MetaData.svg)](https://www.nuget.org/packages/TCSystem.MetaData/)
+
 Classes for handling and storing image metadata including date/time, GPS location, and face/person tags. Supports JSON serialization via Newtonsoft.Json.
 
+## Installation
+
+```bash
+dotnet add package TCSystem.MetaData
+```
+
 ## Features
 
 - Immutable data models for image metadata

MetaDataDB/README.md

@@ -1,7 +1,15 @@
 # TCSystem.MetaDataDB
 
+[![NuGet](https://img.shields.io/nuget/v/TCSystem.MetaDataDB.svg)](https://www.nuget.org/packages/TCSystem.MetaDataDB/)
+
 SQLite database abstraction for storing, querying, and filtering image metadata. Provides thread-safe access through an instance-pooling pattern.
 
+## Installation
+
+```bash
+dotnet add package TCSystem.MetaDataDB
+```
+
 ## Features
 
 - SQLite-based persistent storage for image metadata

README.md

@@ -6,17 +6,14 @@ A collection of reusable .NET libraries for logging, image metadata management,
 
 ## Libraries
 
-### [TCSystem.Util](Util/README.md)
-
-### [TCSystem.Logging](Logging/README.md)
-
-### [TCSystem.MetaData](MetaData/README.md)
-
-### [TCSystem.MetaDataDB](MetaDataDB/README.md)
-
-### [TCSystem.Gps](Gps/README.md)
-
-### [TCSystem.Thread](Thread/README.md)
+| Package | NuGet |
+|---------|-------|
+| [TCSystem.Util](Util/README.md) | [![NuGet](https://img.shields.io/nuget/v/TCSystem.Util.svg)](https://www.nuget.org/packages/TCSystem.Util/) |
+| [TCSystem.Logging](Logging/README.md) | [![NuGet](https://img.shields.io/nuget/v/TCSystem.Logging.svg)](https://www.nuget.org/packages/TCSystem.Logging/) |
+| [TCSystem.MetaData](MetaData/README.md) | [![NuGet](https://img.shields.io/nuget/v/TCSystem.MetaData.svg)](https://www.nuget.org/packages/TCSystem.MetaData/) |
+| [TCSystem.MetaDataDB](MetaDataDB/README.md) | [![NuGet](https://img.shields.io/nuget/v/TCSystem.MetaDataDB.svg)](https://www.nuget.org/packages/TCSystem.MetaDataDB/) |
+| [TCSystem.Gps](Gps/README.md) | [![NuGet](https://img.shields.io/nuget/v/TCSystem.Gps.svg)](https://www.nuget.org/packages/TCSystem.Gps/) |
+| [TCSystem.Thread](Thread/README.md) | [![NuGet](https://img.shields.io/nuget/v/TCSystem.Thread.svg)](https://www.nuget.org/packages/TCSystem.Thread/) |
 
 
 ## Tools

Thread/README.md

@@ -1,7 +1,15 @@
 # TCSystem.Thread
 
+[![NuGet](https://img.shields.io/nuget/v/TCSystem.Thread.svg)](https://www.nuget.org/packages/TCSystem.Thread/)
+
 Thread helper classes including a worker thread that queues commands and executes them in order. Supports async `Task`-based APIs and cancellation tokens.
 
+## Installation
+
+```bash
+dotnet add package TCSystem.Thread
+```
+
 ## Features
 
 - Worker thread with command queue (FIFO execution)

Util/README.md

@@ -1,7 +1,15 @@
 # TCSystem.Util
 
+[![NuGet](https://img.shields.io/nuget/v/TCSystem.Util.svg)](https://www.nuget.org/packages/TCSystem.Util/)
+
 Lightweight extension methods for containers, enumerables, and common patterns such as null-safe equality comparisons.
 
+## Installation
+
+```bash
+dotnet add package TCSystem.Util
+```
+
 ## Features
 
 - Extension methods for collections and enumerables