Move snippets outside of markdown

Signed-off-by: Helder Correia <174525+helderco@users.noreply.github.com>

docs/tests/core-concepts/client/plans/unix.cue

@@ -0,0 +1,20 @@
+dagger.#Plan & {
+	client: filesystem: "/var/run/docker.sock": read: contents: dagger.#Service
+
+	actions: {
+		image: alpine.#Build & {
+			packages: "docker-cli": {}
+		}
+		run: docker.#Run & {
+			input: image.output
+			mounts: docker: {
+				dest:     "/var/run/docker.sock"
+				contents: client.filesystem."/var/run/docker.sock".read.contents
+			}
+			command: {
+				name: "docker"
+				args: ["info"]
+			}
+		}
+	}
+}