feat(wm): add theme socket message

This commit adds a new SocketMessage::Theme which allows for themes to
be set programmatically. This change has also been plumbed through to
komorebi-bar so that the bar theme will also update after komorebi
processes the message and passes it on to subscribers.

A new theme_manager module has been introduced to add notification-based
handling of theme changes, both from the static config file being
updated and from SocketMessage::Theme being received.

komorebi-themes/src/lib.rs

@@ -4,10 +4,12 @@
 use schemars::JsonSchema;
 use serde::Deserialize;
 use serde::Serialize;
+use strum::IntoEnumIterator;
 
 pub use base16_egui_themes::Base16;
 pub use catppuccin_egui;
 pub use eframe::egui::Color32;
+use serde_variant::to_variant_name;
 
 #[derive(Copy, Clone, Debug, Serialize, Deserialize, JsonSchema)]
 #[serde(tag = "type")]
@@ -24,6 +26,28 @@ pub enum Theme {
     },
 }
 
+impl Theme {
+    pub fn variant_names(&self) -> Vec<String> {
+        match self {
+            Theme::Catppuccin { .. } => {
+                vec![
+                    "Frappe".to_string(),
+                    "Latte".to_string(),
+                    "Macchiato".to_string(),
+                    "Mocha".to_string(),
+                ]
+            }
+            Theme::Base16 { .. } => Base16::iter()
+                .map(|variant| {
+                    to_variant_name(&variant)
+                        .expect("could not convert to variant name")
+                        .to_string()
+                })
+                .collect(),
+        }
+    }
+}
+
 #[derive(Copy, Clone, Debug, Default, Serialize, Deserialize, JsonSchema)]
 pub enum Base16Value {
     Base00,