Inhouse i_overlay 7.0.3 and its i_float/i_shape/i_key_sort/i_tree deps
(used by the map road union mesh under the widgets 'maps' feature) as
workspace-excluded path crates, stripped of tests/locks/registry crud.
i_float's no_std libm dependency is removed by switching it to std
float math, so the maps feature no longer pulls any external crates.
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
