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

internal/theming/assets/tokyonight/zellij.kdl

@@ -0,0 +1,35 @@
+theme "tokyonight"
+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 {
+    tokyonight {
+        fg "#c0caf5"
+        bg "#1a1b26"
+        black "#15161e"
+        red "#f7768e"
+        green "#9ece6a"
+        yellow "#e0af68"
+        blue "#7aa2f7"
+        magenta "#bb9af7"
+        cyan "#7dcfff"
+        white "#a9b1d6"
+        orange "#ff9e64"
+    }
+}