Update documentation for local package installation option

- Add Option B: From Local Package installation instructions
- Include make install-local target in both README.md and GETTING_STARTED.md
- Provide clear path for testing PyPI-equivalent installation locally
- Maintains development, local package, and future PyPI installation options

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>

README.md

@@ -8,7 +8,7 @@ This project embraces the Japanese concept of "kaizen" (continuous improvement)
 
 ### Install the Package
 
-**From Source (Current - Development Version):**
+**From Source (Development):**
 ```bash
 git clone https://github.com/kaizen-agentic/kaizen-agentic.git
 cd kaizen-agentic
@@ -17,6 +17,15 @@ make agents-install-cli
 source .venv/bin/activate
 ```
 
+**From Local Package (Test Installation):**
+```bash
+git clone https://github.com/kaizen-agentic/kaizen-agentic.git
+cd kaizen-agentic
+make setup-complete
+python3 -m build && make install-local
+source .venv/bin/activate
+```
+
 **From PyPI (Coming Soon):**
 ```bash
 pip install kaizen-agentic  # Available after v1.0.0 publication