v1.0.1

Update README for npm registry.

• Add npm version badge
• Update usage instructions to use npx instead of local build
• Remove manual install/build steps

v1.0.0

Initial release.

• read-scapple: Parse .scap files into structured JSON
• write-scapple: Create .scap files with automatic bidirectional connection management
• text-to-scapple: Convert indented text into Scapple diagrams with automatic layout
• scapple-to-image: Render .scap files to PNG with full theme support