Fluent constructors for lattice and TPMS families

[kmarchais]

Summary

Replaces the long-positional-argument constructors on the lattice and TPMS families with required-positional __init__ + chained with_* setters. Resolves PLR0913 without noqa.

Changes

Lattice family

• AbstractLattice.__init__(*, center, orientation) only — all geometry params via .with_strut_radius, .with_strut_heights, .with_cell_size, .with_strut_joints, .with_density, .with_base_vertices, .with_strut_vertex_pairs
• CustomLattice(base_vertices, strut_vertex_pairs, *, center, orientation) — required topology positional, rest chained
• Vertex/strut/rotation arrays computed lazily on first access; setters invalidate caches
• Density-to-radius root-find triggered lazily by the strut_radius property

TPMS family

• Tpms(surface_function, *, center, orientation); chained with_offset, with_phase_shift, with_cell_size, with_repeat_cell, with_resolution, with_density
• CylindricalTpms(radius, surface_function, ...), SphericalTpms(radius, surface_function, ...) — theta / phi auto-snap moved into overridden _init_cell_parameters
• Sweep(curve_points, surface_function, radial_max, ...) plus .with_seed_normal, .with_n_curve_samples
• Infill(obj, surface_function, ...) overrides with_cell_size / with_repeat_cell to derive the other from obj.bounds
• GradedInfill(obj, surface_function, ...) exposes .with_gradation(offset_skin, offset_core, transition, smoothness)
• Last-set-wins for mutually exclusive pairs (offset vs density, cell_size vs repeat_cell on Infill)
• Grid built eagerly with defaults; setters rebuild grid as needed and reapply callable offsets

Misc

• _BBox converted to a dataclass
• pyproject.toml: PLR0913 added to [tool.ruff.lint] extend-select
• 22 example files and 58 test-site calls rewritten to the fluent API

Notes

• Stacked conceptually on top of Enforce FBT001/FBT002 and N802 ruff rules #135; merge order: Enforce FBT001/FBT002 and N802 ruff rules #135 first, then this rebases trivially