chore: import upstream snapshot with attribution

examples/systems-package/src/helpers.0

@@ -0,0 +1,7 @@
+fn cleanup() -> Void {
+    return
+}
+
+fn status() -> Status {
+    return Status.ready
+}

examples/systems-package/src/main.0

@@ -0,0 +1,19 @@
+use std.codec
+
+use std.parse
+
+use std.time
+
+use helpers
+
+use types
+
+pub fn main(world: World) -> Void raises {
+    let utf8_ok: Bool = std.codec.utf8Valid("abcd")
+    let digits: usize = std.parse.scanDigits("123abc")
+    let duration: Duration = std.time.add(std.time.ms(5), std.time.seconds(1))
+    if digits == 3 && utf8_ok && std.time.asMsFloor(duration) > 0 {
+        check world.out.write("systems package\n")
+    }
+    cleanup()
+}

examples/systems-package/src/types.0

@@ -0,0 +1,9 @@
+enum Status {
+    ready,
+    failed,
+}
+
+choice Result {
+    ok,
+    failed: i32,
+}

examples/systems-package/zero.toml

@@ -0,0 +1,7 @@
+[package]
+name = "systems-package"
+version = "0.1.0"
+
+[targets.cli]
+kind = "exe"
+main = "src/main.0"