Add the pluggable solver API as header-only files under
src/Mod/Assembly/Solver/. This is Phase 1a of the pluggable solver
system (INTER_SOLVER.md).
New files:
- Types.h: BaseJointKind enum (24 decomposed constraint types),
Transform, Part, Constraint, SolveContext, SolveResult, and
supporting types. Uses standalone types (no FreeCAD dependency)
for future server worker compatibility.
- IKCSolver.h: Abstract solver interface with solve(), drag protocol
(pre_drag/drag_step/post_drag), kinematic simulation
(run_kinematic/num_frames/update_for_frame), and diagnostics.
Only solve(), name(), and supported_joints() are pure virtual;
all other methods have default implementations.
- SolverRegistry.h: Thread-safe singleton registry for solver
backends with factory-based registration and default solver
selection.
- CMakeLists.txt: INTERFACE library target (header-only for now).
Modified:
- Assembly/CMakeLists.txt: add_subdirectory(Solver)
- Assembly/App/CMakeLists.txt: link KCSolve INTERFACE target
47e6c14461