docs(readme): fix CLI command examples to include 'assess' subcommand (#126)

The README documentation showed incorrect command usage like 'agentready .'
when the actual CLI implementation requires 'agentready assess .'. This fix
updates all command examples in the README to match the current CLI structure.

Changes:
- Updated 'Assessment Only' section examples
- Updated 'CLI Reference' section
- Updated 'Quick Start' footer command

Fixes the discrepancy between documented and actual CLI usage.

Author: dkoul

README.md

@@ -63,16 +63,16 @@ For one-time analysis without infrastructure changes:
 
 ```bash
 # Assess current repository
-agentready .
+agentready assess .
 
 # Assess another repository
-agentready /path/to/your/repo
+agentready assess /path/to/your/repo
 
 # Specify custom configuration
-agentready /path/to/repo --config my-config.yaml
+agentready assess /path/to/repo --config my-config.yaml
 
 # Custom output directory
-agentready /path/to/repo --output-dir ./reports
+agentready assess /path/to/repo --output-dir ./reports
 ```
 
 ### Example Output
@@ -156,10 +156,10 @@ output_dir: ./custom-reports
 
 ```bash
 # Assessment commands
-agentready PATH                          # Assess repository at PATH
-agentready PATH --verbose                # Show detailed progress
-agentready PATH --config FILE            # Use custom configuration
-agentready PATH --output-dir DIR         # Custom report location
+agentready assess PATH                   # Assess repository at PATH
+agentready assess PATH --verbose         # Show detailed progress
+agentready assess PATH --config FILE     # Use custom configuration
+agentready assess PATH --output-dir DIR  # Custom report location
 
 # Configuration commands
 agentready --validate-config FILE        # Validate configuration
@@ -273,4 +273,4 @@ Contributions welcome! Please ensure:
 
 ---
 
-**Quick Start**: `pip install -e ".[dev]" && agentready .` - Ready in <5 minutes!
+**Quick Start**: `pip install -e ".[dev]" && agentready assess .` - Ready in <5 minutes!