add app layout shell to the layout crate

crates/icons/assets/panel-left.svg

@@ -0,0 +1 @@
+<svg xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"><rect width="18" height="18" x="3" y="3" rx="2"/><path d="M9 3v18"/></svg>

crates/icons/assets/panel-right.svg

@@ -0,0 +1 @@
+<svg xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"><rect width="18" height="18" x="3" y="3" rx="2"/><path d="M15 3v18"/></svg>

crates/icons/src/lib.rs

@@ -29,6 +29,8 @@ pub enum IconRole {
     Info,
     Eye,
     EyeOff,
+    PanelLeft,
+    PanelRight,
 }
 
 impl IconRole {
@@ -48,6 +50,8 @@ impl IconRole {
             Self::Info,
             Self::Eye,
             Self::EyeOff,
+            Self::PanelLeft,
+            Self::PanelRight,
         ]
     }
 
@@ -67,6 +71,8 @@ impl IconRole {
             Self::Info => "icons/info.svg",
             Self::Eye => "icons/eye.svg",
             Self::EyeOff => "icons/eye-off.svg",
+            Self::PanelLeft => "icons/panel-left.svg",
+            Self::PanelRight => "icons/panel-right.svg",
         }
     }
 
@@ -86,6 +92,8 @@ impl IconRole {
             Self::Info => "info",
             Self::Eye => "eye",
             Self::EyeOff => "eye-off",
+            Self::PanelLeft => "panel-left",
+            Self::PanelRight => "panel-right",
         }
     }
 
@@ -144,6 +152,19 @@ impl IconRole {
                 "visibility-off",
                 "eye-off",
             ],
+            Self::PanelLeft => &[
+                "sidebar-expand-left",
+                "sidebar-show-symbolic",
+                "panel-left",
+                "sidebar-left",
+            ],
+            Self::PanelRight => &[
+                "sidebar-expand-right",
+                "sidebar-show-right-symbolic",
+                "sidebar-show-symbolic",
+                "panel-right",
+                "sidebar-right",
+            ],
         }
     }
 }
@@ -254,6 +275,8 @@ fn asset_bytes(path: &str) -> Option<&'static [u8]> {
         "icons/info.svg" => Some(include_bytes!("../assets/info.svg")),
         "icons/eye.svg" => Some(include_bytes!("../assets/eye.svg")),
         "icons/eye-off.svg" => Some(include_bytes!("../assets/eye-off.svg")),
+        "icons/panel-left.svg" => Some(include_bytes!("../assets/panel-left.svg")),
+        "icons/panel-right.svg" => Some(include_bytes!("../assets/panel-right.svg")),
         _ => None,
     }
 }

crates/icons/src/segoe.rs

@@ -20,6 +20,8 @@ pub(crate) fn glyph(role: IconRole) -> Option<char> {
         IconRole::Info => 0xE946,         // Info
         IconRole::Eye => 0xE7B3,          // RedEye
         IconRole::EyeOff => 0xED1A,       // Hide
+        IconRole::PanelLeft => 0xE90C,    // DockLeft
+        IconRole::PanelRight => 0xE90D,   // DockRight
     };
     char::from_u32(codepoint)
 }