Merge main and retain Cineon Settings in the extracted modules

Resolve the Interpret Footage form against main's split into
interpret_footage_form and project_settings_form, keeping the Cineon
Settings fields and the pointUnits readback. Restore the Arc, rayon
prelude and cineon_frame imports that main's explicit use lists dropped.

crates/render/src/frames.rs

@@ -1,6 +1,9 @@
 use super::footage::NoFootage;
 use super::opts::RenderOpts;
-use super::*;
+use super::{
+    Arc, EvalCtx, Footage, FrameBlend, FrameRate, Image, ItemId, Layer, LayerSource, Project, Renderer, TICKS_PER_SECOND, Tick, shapes, source_size, text,
+};
+use rayon::prelude::*;
 
 /// The layer's frame blending mode, if the comp's Enable Frame Blending switch is on.
 /// One field of an interlaced frame as a full frame: the field's lines (`parity` 0 = even /