docs: update README with current implementation details

[JnyJny]

Summary

This PR updates the README to accurately reflect the current implementation and removes marketing language in favor of direct, technical descriptions.

Key Updates

🎯 Direct Language

• Removed marketing phrases like "BusyLight for Humans™" and flowery descriptions
• Used clear, technical language to describe functionality
• Focused on what the software does, not promotional language

📚 Current Implementation Details

• LED Parameter Support: Added documentation for individual LED control
• Updated Examples: CLI and API examples now include LED targeting options
• Device Capabilities: Added LED support column to vendor table
• Architecture Reflection: Documentation matches current controller-based architecture

🔧 Enhanced Documentation

Command-Line Examples

• Added LED targeting section with --led parameter examples
• Updated basic usage examples for clarity
• Included multi-LED device specific examples

HTTP API Examples

• Added LED parameter usage in API endpoints
• Updated JSON response examples to include led field
• Separated basic and LED targeting examples

LED Parameter Reference

• Complete reference for LED parameter behavior
• Device-specific LED indexing information
• Clear explanation of multi-LED vs single-LED device behavior

📊 Updated Vendor Table

• Added "LED Support" column showing device capabilities
• Clarified which devices support individual LED control
• Updated ThingM entry to specify Blink(1) mk2 multi-LED support

🛠️ Simplified Sections

• Development Install: Removed unnecessary detail, kept essential information
• Features List: Updated to reflect current capabilities
• Installation: Maintained existing structure with clearer descriptions

Technical Accuracy

✅ Reflects Current Codebase

• All examples work with current implementation
• LED parameter documentation matches actual API behavior
• Command-line options reflect current CLI interface

✅ No Marketing Language

• Removed promotional phrases and superlatives
• Used direct, factual descriptions
• Focused on technical capabilities and usage

✅ Complete Coverage

• Documents all major features including recent LED parameter addition
• Covers both CLI and API usage patterns
• Includes device compatibility information

Compatibility

This documentation update maintains all existing information while adding new LED parameter functionality. All existing examples continue to work as documented.

The updated README provides users with accurate, current information about the project's capabilities without promotional language.

[JnyJny]

📏 80-Column Line Width Compliance Added

Latest commit enforces 80-column line widths throughout the README:

Changes Made

• Natural line breaks: Split long sentences at logical break points
• Preserved readability: Maintained markdown flow and formatting
• Content integrity: No content changes, purely formatting improvements

Acceptable Exceptions

• HTML comment (SEO keywords)
• Table rows with device lists
• URL references (standard practice)

The README now follows standard line width conventions while maintaining excellent readability and proper markdown structure.