Squashed commit of the following:

commit cb3831e
Author: Kartavya Vashishtha <[email protected]>
Date:   Wed Jun 5 17:35:44 2024 -0400

    fix: export Duration once

commit dc7ac1f
Author: Kartavya Vashishtha <[email protected]>
Date:   Wed Jun 5 10:09:23 2024 -0400

    fmt: duration.rs: remove extra line

commit 2e6703b
Author: Kartavya Vashishtha <[email protected]>
Date:   Tue Jun 4 19:56:34 2024 -0400

    tidy(duration)

commit aa2a5f3
Author: Kartavya Vashishtha <[email protected]>
Date:   Tue Jun 4 12:57:46 2024 -0400

    fix: remove accidentally committed testdata

commit c86db97
Author: Kartavya Vashishtha <[email protected]>
Date:   Mon Jun 3 21:50:12 2024 -0400

    docs(duration): add outer module documentation for duration.rs

components/experimental/src/duration/mod.rs

@@ -6,5 +6,7 @@
 
 #![warn(missing_docs)]
 
-pub mod duration;
+mod duration;
 pub mod options;
+
+pub use duration::{Duration, DurationSign};