* Revamp the minitesting bundled configuration so it uses Rack::Test and the Roda server

* Use more appropriate log level setting

* Remove hardcoded `roda_app.rb` file path, other serveer Zeitwerk optimizations

Fixes #688

* Add support for Minitest expectations to Bridgetown tests

- also add  "intuitive" expectations like `expect(something) == "to equal this"`
- remove RSpec Mocks library and replace with Minitest mocks and stubs

* Move expectations so that Bridgetown::Test can access it too

* Set ENV var so expectations aren't polluting Object

* Include full Spec DSL in `Bridgetown::Test`

transition some "shoulda" style tests to Minitest spec syntax

* use extend rather than include

* fix whitespace

* Relocate server autoload code to a new module

* Add information about spec-style tests, link to cheat sheet

* remove spurious method