test: replace broken tests, add coverage for dataclasses/widgets/module

- Delete test_controller.py, test_state.py (imported removed modules)
- Add test_dataclasses.py (defaults, mutations, mapper wiring, presets)
- Add test_widgets.py (buttons helper, f-string regression, exports)
- Add test_module.py (module.setup no-op)
- Update test_smoke.py (trame entry point import tests)
- 138 tests passing

Author: olearypatrick

README.md

@@ -4,7 +4,7 @@ build-backend = "setuptools.build_meta"
 
 [project]
 name = "trame-colormaps"
-version = "0.1.0"
+version = "1.0.0"
 description = "Self-contained colormap module for VTK color transfer functions in Trame apps"
 readme = "README.md"
 license = {text = "BSD-3-Clause"}