feat(theming): add catppuccin, dracula, nord, tokyonight themes

internal/theming/assets/dracula/zellij.kdl

@@ -0,0 +1,35 @@
+theme "dracula"
+default_layout "default"
+default_mode "normal"
+pane_frames false
+simplified_ui true
+mouse_mode false
+
+keybinds {
+    shared {
+        bind "Alt h" { MoveFocusOrTab "Left"; }
+        bind "Alt l" { MoveFocusOrTab "Right"; }
+        bind "Alt j" { MoveFocus "Down"; }
+        bind "Alt k" { MoveFocus "Up"; }
+        bind "Alt n" { NewPane "Down"; }
+        bind "Alt v" { NewPane "Right"; }
+        bind "Alt f" { ToggleFloatingPanes; }
+        bind "Alt t" { NewTab; }
+    }
+}
+
+themes {
+    dracula {
+        fg "#f8f8f2"
+        bg "#282a36"
+        black "#21222c"
+        red "#ff5555"
+        green "#50fa7b"
+        yellow "#f1fa8c"
+        blue "#bd93f9"
+        magenta "#ff79c6"
+        cyan "#8be9fd"
+        white "#bfbfbf"
+        orange "#ffb86c"
+    }
+}