Add development dependencies to pyproject.toml

- Add [project.optional-dependencies] section with dev group
- Include pytest>=8.0.0 and pytest-anyio>=0.6.0
- Add Development Setup section to README-DEV.md with installation and testing instructions

Author: dsarno

MCPForUnity/UnityMcpServer~/src/pyproject.toml

@@ -11,6 +11,12 @@ dependencies = [
  "tomli>=2.3.0",
 ]
 
+[project.optional-dependencies]
+dev = [
+    "pytest>=8.0.0",
+    "pytest-anyio>=0.6.0",
+]
+
 [build-system]
 requires = ["setuptools>=64.0.0", "wheel"]
 build-backend = "setuptools.build_meta"

docs/README-DEV.md

@@ -5,6 +5,36 @@
 
 Welcome to the MCP for Unity development environment! This directory contains tools and utilities to streamline MCP for Unity core development.
 
+## 🛠️ Development Setup
+
+### Installing Development Dependencies
+
+To contribute or run tests, you need to install the development dependencies:
+
+```bash
+# Navigate to the server source directory
+cd MCPForUnity/UnityMcpServer~/src
+
+# Install the package in editable mode with dev dependencies
+pip install -e .[dev]
+```
+
+This installs:
+- **Runtime dependencies**: `httpx`, `mcp[cli]`, `pydantic`, `tomli`
+- **Development dependencies**: `pytest`, `pytest-anyio`
+
+### Running Tests
+
+```bash
+# From the repo root
+pytest tests/ -v
+```
+
+Or if you prefer using Python module syntax:
+```bash
+python -m pytest tests/ -v
+```
+
 ## 🚀 Available Development Features
 
 ### ✅ Development Deployment Scripts