Port go package to universe to resolves #1553

Definition are now split in their own file.
`#Image` is a simple base image to set up a go container
`#Container` is a standalone environment to execute go command, any go command
should use this definition.
It shares `docker.#Run` fields to easily maintains this definition.
`#Build` and `#Test` are high level definition that use `#Container` to
execute common go operation in a CI.

Those definitions are tested with a simple greeting package.

Signed-off-by: Vasek - Tom C <tom.chauveau@epitech.eu>

pkg/universe.dagger.io/go/test/test.cue

@@ -0,0 +1,15 @@
+package go
+
+import (
+	"dagger.io/dagger"
+	"universe.dagger.io/go"
+)
+
+dagger.#Plan & {
+	inputs: directories: testhello: path: "./data/hello"
+
+	actions: tests: test: simple: go.#Test & {
+		source:  inputs.directories.testhello.contents
+		package: "./greeting"
+	}
+}