P5: add facade sketch model solver and persistence

src/facade/index.ts

@@ -5,3 +5,5 @@ export { assertShapeHandleIntegrity, BitbybitGeometryRuntime, normalizeBitbybitM
 export { PROJECT_SCHEMA_MIGRATIONS, PROJECT_SCHEMA_SQL, PROJECT_SCHEMA_VERSION } from './projectSchema'
 export type { ApplyPlacementInput, BitBybitViewportAdapter, BitBybitWebCadFacade, BooleanCutInput, BooleanIntersectionInput, BooleanUnionInput, CommandState, CreateBoxInput, CreateConeInput, CreateCylinderInput, CreateSphereInput, DocumentObjectSnapshot, DocumentSnapshot, FacadeEvent, FacadeState, GeometryCapabilities, GeometryDocumentContext, LinearFeatureParameters, MeshAsset, ModelTreeItem, ObjectPropertySnapshot, PadInput, PersistenceCapabilities, Placement, PlanarProfile, PocketInput, Point3, ProjectResource, ProjectSaveResult, PropertyValue, RecomputeResult, RevolutionInput, SetExpressionInput, SetPropertyInput, ShapeHandle, SubshapeRef, TaskSnapshot } from './types'
 export { createSubshapeRefs, matchSubshapes, signatureForFace } from './topologyNaming'
+export { BasicSketchSolverAdapter, cloneSketch, createSketch, solveSketch } from './sketcher'
+export type { SketchConstraint, SketchDiagnostic, SketchGeometry, SketchPoint, SketchPointRef, SketchSnapshot, SketchSolveOptions, SketchSolveResult, SketchSolverAdapter, SketchSolverStatus } from './sketcher'