Remove text propety.

crates/api/src/layout/fixed_size.rs

crates/api/src/layout/text_selection.rs

crates/api/src/macros.rs

crates/api/src/properties/mod.rs

crates/api/src/properties/widget/mod.rs

crates/api/src/properties/widget/text.rs

crates/api/src/render_object/text.rs

crates/api/src/widget/widget_container.rs

crates/widgets/src/button.rs

crates/widgets/src/check_box.rs

crates/widgets/src/cursor.rs

crates/widgets/src/text_block.rs

crates/widgets/src/text_box.rs

crates/widgets/src/toggle_button.rs

examples/calculator.rs

examples/widgets.rs