Add :dev alias

During development, you usually want the `test` directory on your classpath.

With Calva, I cannot use the existing `:test` alias since it has `main-opts`.

Alternatively, we could extract the Kaocha runner from the `:test` alias to its own.

Author: ferdinand-beyer

deps.edn

@@ -4,7 +4,8 @@
         cheshire/cheshire {:mvn/version "5.11.0"}
         funcool/promesa {:mvn/version "10.0.594"}}
  :paths ["src" "resources"]
- :aliases {:test {:extra-deps {lambdaisland/kaocha {:mvn/version "1.64.1010"}}
+ :aliases {:dev {:extra-paths ["test"]}
+           :test {:extra-deps {lambdaisland/kaocha {:mvn/version "1.64.1010"}}
                   :extra-paths ["test"]
                   :main-opts ["-m" "kaocha.runner"]}
            :build {:extra-paths ["resources"]