[FIX] Support H/V commands in SVG paths
[FIX] Support H/V commands in SVG paths

Prior to this commit, `svg:path` elements containing `M` and `L`
commands were recognized by the `svg_model.svg_shapes_to_df` function.

This commit adds support for `H` or `V` commands (i.e.,
horizontal/vertical `svg:path` lines) in SVG paths.

wheeler-microfluidics/svg_model