Refactor: Перенёс логику создания фигур

Я перенёс логику создания объектов фигур из `Document.zig` и `Object.zig` в новый модуль `shape.zig`. Это упрощает добавление новых фигур и улучшает организацию кода.

src/models/Object.zig

@@ -1,10 +1,6 @@
 const std = @import("std");
-const basic_models = @import("basic_models.zig");
-const Size = basic_models.Size;
-const Point2 = basic_models.Point2;
 const Property = @import("Property.zig").Property;
 const PropertyData = @import("Property.zig").Data;
-const defaultCommonProperties = @import("Property.zig").defaultCommonProperties;
 const Object = @This();
 
 pub const ShapeKind = enum {
@@ -68,41 +64,3 @@ pub fn deinit(self: *Object, allocator: std.mem.Allocator) void {
     self.properties.deinit(allocator);
     self.* = undefined;
 }
-
-fn createWithCommonProperties(allocator: std.mem.Allocator, shape: ShapeKind) !Object {
-    var properties_list = std.ArrayList(Property).empty;
-    errdefer properties_list.deinit(allocator);
-    for (defaultCommonProperties) |prop| try properties_list.append(allocator, prop);
-    return .{
-        .shape = shape,
-        .properties = properties_list,
-        .children = std.ArrayList(Object).empty,
-    };
-}
-
-pub fn createEllipse(allocator: std.mem.Allocator) !Object {
-    var obj = try createWithCommonProperties(allocator, .ellipse);
-    errdefer obj.deinit(allocator);
-    try obj.properties.append(allocator, .{ .data = .{ .radii = .{ .x = 50, .y = 50 } } });
-    return obj;
-}
-
-pub fn createLine(allocator: std.mem.Allocator) !Object {
-    var obj = try createWithCommonProperties(allocator, .line);
-    errdefer obj.deinit(allocator);
-    try obj.properties.append(allocator, .{ .data = .{ .end_point = .{ .x = 100, .y = 0 } } });
-    return obj;
-}
-
-pub fn createBrokenLine(allocator: std.mem.Allocator) !Object {
-    var obj = try createWithCommonProperties(allocator, .broken);
-    errdefer obj.deinit(allocator);
-    var points = std.ArrayList(Point2).empty;
-    try points.appendSlice(allocator, &.{
-        .{ .x = 0, .y = 0 },
-        .{ .x = 80, .y = 0 },
-        .{ .x = 80, .y = 60 },
-    });
-    try obj.properties.append(allocator, .{ .data = .{ .points = points } });
-    return obj;
-}