Add LED tool: device, CLI, web UI, build scripts, and tests

- device.py: device communication/handling
- cli.py: CLI interface updates
- web.py: web interface
- build.py, build.sh, install.sh: build and install scripts
- Pipfile: Python dependencies
- lib/mpremote: mpremote library
- test_*.py: import and LED tests
- Updated .gitignore and README

Co-authored-by: Cursor <cursoragent@cursor.com>

build.py

@@ -0,0 +1,76 @@
+#!/usr/bin/env python3
+"""
+Build script for creating binary executables from the CLI and web tools.
+"""
+
+import subprocess
+import sys
+import os
+
+def build_binary(script_name, output_name=None):
+    """Build a binary from a Python script using PyInstaller."""
+    if output_name is None:
+        output_name = script_name.replace('.py', '')
+    
+    print(f"Building {script_name} -> {output_name}...")
+    
+    cmd = [
+        'pyinstaller',
+        '--onefile',  # Create a single executable file
+        '--name', output_name,
+        '--clean',  # Clean PyInstaller cache
+        script_name
+    ]
+    
+    # Add hidden imports that might be needed
+    hidden_imports = [
+        'mpremote.transport_serial',
+        'mpremote.transport',
+        'mpremote.console',
+        'mpremote.mp_errno',
+        'serial',
+        'serial.tools.list_ports',
+    ]
+    
+    for imp in hidden_imports:
+        cmd.extend(['--hidden-import', imp])
+    
+    # Include the lib directory
+    cmd.extend(['--add-data', 'lib:lib'])
+    
+    result = subprocess.run(cmd, cwd=os.path.dirname(os.path.abspath(__file__)))
+    
+    if result.returncode == 0:
+        print(f"✓ Successfully built {output_name}")
+        print(f"  Binary location: dist/{output_name}")
+    else:
+        print(f"✗ Failed to build {output_name}")
+        return False
+    
+    return True
+
+if __name__ == '__main__':
+    print("Building binaries for led-tool...")
+    print("=" * 60)
+    
+    success = True
+    
+    # Build CLI binary
+    if build_binary('cli.py', 'led-cli'):
+        print()
+    else:
+        success = False
+    
+    # Optionally build web binary (commented out as it's less common)
+    # if build_binary('web.py', 'led-tool-web'):
+    #     print()
+    # else:
+    #     success = False
+    
+    if success:
+        print("=" * 60)
+        print("Build complete! Binaries are in the 'dist' directory.")
+    else:
+        print("=" * 60)
+        print("Build failed. Check errors above.")
+        sys.exit(1)