feat: add Pulumi support

Signed-off-by: David Flanagan <david@rawkode.com>

pkg/universe.dagger.io/x/david@rawkode.dev/pulumi/example.cue

@@ -0,0 +1,29 @@
+package rawkode_pulumi_example
+
+import (
+	"dagger.io/dagger"
+	"universe.dagger.io/x/david@rawkode.dev/pulumi"
+)
+
+dagger.#Plan & {
+	client: {
+		filesystem: {
+			"./": read: {
+				contents: dagger.#FS
+			}
+		}
+		env: {
+			PULUMI_CONFIG_PASSPHRASE: dagger.#Secret
+			PULUMI_ACCESS_TOKEN:      dagger.#Secret
+		}
+	}
+	actions: {
+		rawkode: pulumi.#Up & {
+			stack:       "test"
+			stackCreate: true
+			runtime:     "nodejs"
+			accessToken: client.env.PULUMI_ACCESS_TOKEN
+			source:      client.filesystem."./".read.contents
+		}
+	}
+}