plot styles: the CTB/STB model and codec come from the codec crate

Cargo: codec d36331d, kernel 60f086b, graph 74aac56.

The table model and its file codec now live in `codec::plot_style`
(opencadcodec#53) and are re-exported here. What stays is where tables
come from: the plot styles folder, the session registry, the shipped
tables, and saving to disk, as the `PlotStyleTableExt` trait.

Co-Authored-By: Claude Opus 5.5 <[email protected]>

src/app/commands/fileops.rs

@@ -1,4 +1,6 @@
 use super::*;
+#[cfg(target_arch = "wasm32")]
+use crate::io::plot_style::PlotStyleTableExt as _;
 
 impl OpenCADStudio {
     pub(super) fn dispatch_fileops(&mut self, cmd: &str, i: usize) -> Option<Task<Message>> {

src/app/control/actions.rs

@@ -1,3 +1,5 @@
+#[cfg(not(target_arch = "wasm32"))]
+use crate::io::plot_style::PlotStyleTableExt as _;
 use super::*;
 use crate::scene::model::object::PropValue;
 

src/app/mod.rs

@@ -66,6 +66,7 @@ pub use settings::MAX_SELECTED_GRIPS;
 /// as they are; only these two names are reachable externally.
 pub use settings::{CursorType, IsoPlane};
 
+use crate::io::plot_style::PlotStyleTableExt as _;
 use document::DocumentTab;
 
 use crate::modules::ModuleEvent;

src/app/update/file.rs

@@ -1,6 +1,7 @@
 //! `file` arms and helpers, split out of the original `update.rs` (#mechanical decomposition).
 
 #![allow(unused_imports)]
+use crate::io::plot_style::PlotStyleTableExt as _;
 use super::util::*;
 use super::{format_size, VIEWCUBE_HIT_SIZE};
 use crate::app::helpers::{

src/app/update/mod.rs

@@ -1,3 +1,4 @@
+use crate::io::plot_style::PlotStyleTableExt as _;
 use super::{ArrowKey, Message, OpenCADStudio, TextEntryMode};
 use crate::command::CadCommand;
 use crate::scene::VIEWCUBE_DRAW_PX;