test: added test for ignoring .dagger directory in input dir

Signed-off-by: Sam Alba <sam.alba@gmail.com>

tests/cli/input/ignore/main.cue

@@ -0,0 +1,20 @@
+package testing
+
+import (
+	"dagger.io/dagger/op"
+	"dagger.io/dagger"
+)
+
+source: dagger.#Artifact
+
+#up: [
+	op.#FetchContainer & {ref: "busybox"},
+	op.#Exec & {
+		args: ["sh", "-c", """
+			set -exu
+			[ -f /source/testfile ]
+			[ ! -d /source/.dagger ]
+			"""]
+		mount: "/source": from: source
+	},
+]

tests/cli/input/ignore/testdata/testfile

@@ -0,0 +1 @@
+thisisatest