Theme · Importing: VS Code themes read into Ely's palette, code palettes to choose

settings::read_vscode_theme reads a VS Code color theme, comments and
trailing commas and all: its type picks the mode, its colors and token
scopes name what they give, and the rest keep Ely's palette of that mode.
settings::ThemeImporter takes one dropped or browsed for, shows its name,
mode and count, and hands it over on Apply; a file that does not read
says why. theme::syntax_themes offers Ely's code colors, Quiet and Paper,
chosen through settings::SyntaxThemePicker, radio cards with a line of
code in each palette. A card's words now shrink as a plain block, so a
preview wraps inside the card at 280px.

src/theme/mod.rs

@@ -10,6 +10,7 @@ mod messaging;
 mod onboarding;
 mod palette;
 mod project;
+mod syntax;
 mod tokens;
 
 #[cfg(all(test, feature = "test-support"))]
@@ -32,6 +33,7 @@ pub use messaging::MessagingSizes;
 pub use onboarding::OnboardingSizes;
 pub use palette::{HUE_NAMES, Mix, Palette, Syntax};
 pub use project::ProjectSizes;
+pub use syntax::{SyntaxTheme, syntax_themes};
 pub use tokens::{
     AvatarSize, ContainerSize, ControlSize, Density, Elevation, IconSize, Radius, TextSize,
 };