raygeo v0.8.0

What's Changed

SVG processing

• Add extract_svg_metadata(), parse_svg_length(), svg_length_to_mm(), and svg_length_to_px() helpers.
• Add svg_string_to_geometry_by_layer() — extract per-layer geometry from SVG strings.
• Add unit conversion helpers to the SvgMetadata Python class.
• Fix SVG arc import/export bugs and derive large-arc flag at export.
• Remove BORDER_SIZE from SVG coordinate transform.

Image preprocessing (new module)

• Add preprocess module with Otsu thresholding and connected-component analysis.
• Add denoise_binary() and compute_adaptive_threshold().

Scanline / rasterisation

• Add extract_zero_power_segments() for zero-power segment extraction from scanlines.
• Add transform_to_cylinder() and rasterize_scanlines().

Geometry / fitting

• Add convert_arcs_to_beziers() for arc-to-bezier conversion.
• Remove redundant create_arc_cmd and create_line_cmd from the fitting module.

Documentation

• Add complexity documentation to each API function.
• Add many more visual examples and auto-generated doc images.
• Add a visualization for apply_minimum_run_length().

Full Changelog: v0.7.1...v0.8.0