Update documentation for first-time users and fix outdated agent names

Major documentation improvements:
- Fixed all outdated agent names throughout README.md and GETTING_STARTED.md
- Updated agent references from old names (todo-keeper, changelog-keeper, setup-repository)
  to new names (keepaTodofile, keepaChangelog, setupRepository)
- Created comprehensive HELLO_WORLD_TUTORIAL.md with step-by-step guide for new users
- Added prominent tutorial links in README.md and GETTING_STARTED.md for better discoverability
- Updated Python version requirements from 3.8 to 3.9 in project templates
- Enhanced first-time user experience with clear guidance and working examples

Documentation now provides:
✅ Working commands that match actual agent names
✅ Clear separation between new users and experienced users
✅ Complete tutorial from installation to running code
✅ Proper guidance for scenario one (greenfield projects)

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

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

docs/GETTING_STARTED.md

@@ -2,6 +2,8 @@
 
 This guide walks you through using Kaizen Agentic agents in any project, from initial installation to full integration.
 
+> **👋 New User?** Start with our [Hello World Tutorial](HELLO_WORLD_TUTORIAL.md) for a complete step-by-step walkthrough.
+
 ## Quick Start
 
 ### 1. Install the Package
@@ -50,9 +52,9 @@ cd my-project
 git init
 
 # Install agents
-kaizen-agentic install setup-repository todo-keeper changelog-keeper
+kaizen-agentic install setupRepository keepaTodofile keepaChangelog
 
-# The setup-repository agent can create the full project structure
+# The setupRepository agent can create the full project structure
 # Use it via Claude Code or manually follow its patterns
 ```
 
@@ -65,7 +67,7 @@ kaizen-agentic install setup-repository todo-keeper changelog-keeper
 cd /path/to/your/project
 
 # Install relevant agents
-kaizen-agentic install todo-keeper changelog-keeper tdd-workflow
+kaizen-agentic install keepaTodofile keepaChangelog tdd-workflow
 
 # Check what was installed
 kaizen-agentic status
@@ -224,7 +226,7 @@ alias ka-list="kaizen-agentic list"
 # Now you can use:
 # ka status
 # ka update
-# ka install todo-keeper
+# ka install keepaTodofile
 ```
 
 ## Language-Specific Integration
@@ -295,7 +297,7 @@ kaizen-agentic status
 
 # Read agent files directly
 ls agents/
-cat agents/agent-todo-keeper.md
+cat agents/agent-keepaTodofile.md
 
 # Validate your setup
 kaizen-agentic validate
@@ -374,10 +376,10 @@ pip install kaizen-agentic
 **"No agents directory found"**
 ```bash
 # Install some agents first
-kaizen-agentic install todo-keeper
+kaizen-agentic install keepaTodofile
 
 # Or initialize a new project
-kaizen-agentic init . --agents todo-keeper,changelog-keeper
+kaizen-agentic init . --agents keepaTodofile,keepaChangelog
 ```
 
 **"Agent validation fails"**