Size the Footprint Estimate from the Planners

The shared estimate reserved every tower with one volume-per-purge rule
and the stability floor. Both planners do more: WipeTower (Type1) wipes
each filament's own prime volume in whole lines, one block per
adhesiveness category sized by its worst layer, rams the leaving
filament at every nozzle change, and squares a rib tower from the
planned depth; WipeTower2 (Type2) spaces its lines by
wipe_tower_extra_spacing, not the Type1-only infill gap, and its extra
flow cancels out of the depth. Both extend the ribs rather than the body
below the stability minimum, size every layer including a thinner first
one, and lay the brim in whole loops, WipeTower reporting half a spacing
of line width on top.

All of that now lives in estimate_wipe_tower_footprint, fed the planner
(resolve_wipe_tower_type mirrors Print::wipe_tower_type and the CLI's
Bambu Lab detection) and the filament ids rather than a count. Print
passes its own tool set; the PartPlate adapter derives the plate's ids
from the passed config and treats an explicit count as a floor, so the
CLI's count-only callers size per filament too. The placement clamp also
reserves a Type2 cone's base bulge, which the body box does not cover.

The planner-mirroring helpers sit beside the planners in WipeTower and
WipeTower2 so the two stay in sync; the libslic3r cases pin them to
footprints measured from generated G-code.

src/libslic3r/GCode/WipeTower2.hpp

@@ -27,6 +27,10 @@ public:
     // in WipeTowerIntegration::append_tcr2 does not strip it.
     static const std::string wait_for_temp_tag() { return ";_WAIT_FOR_TEMP_ON_WIPE_TOWER"; }
 	static std::pair<double, double> get_wipe_tower_cone_base(double width, double height, double depth, double angle_deg);
+	// First-layer outline of a cone-wall tower in tower-local (scaled) coordinates: body box
+	// unioned with the cone's base ellipse — the model first_layer_wipe_tower_corners uses,
+	// and generate_support_cone_wall stays within it. Brim not included.
+	static Polygon cone_base_polygon(double width, double depth, double height, double angle_deg);
 	static std::vector<std::vector<float>> extract_wipe_volumes(const ConfigBase& config);
 	// Estimated total flush volume of a SEMM print with the given number of filaments,
 	// used to reserve wipe tower space before the tower is generated.