feat(themes): add color derivation and themed app templates

Add script/omarchy-theme-color and expand omarchy-theme-set-templates to
derive a full palette from each theme's colors.toml, then render new
themed templates (shell, pi, vscode theme, gum, neovim, claude, hermes,
t3code) from it.

Adds backgrounds and palette updates for existing themes plus new themes
(last-horizon, lupine, solitude, tidewater-*, miasma, ...).

themes/last-horizon/btop.theme

@@ -0,0 +1,93 @@
+# Main background
+theme[main_bg]="#0c0b0c"
+
+# Main text color
+theme[main_fg]="#e2dddc"
+
+# Title color for boxes
+theme[title]="#b59790"
+
+# Highlight color for keyboard shortcuts
+theme[hi_fg]="#c4d8e2"
+
+# Background color of selected item in processes box
+theme[selected_bg]="#e2dddc"
+
+# Foreground color of selected item in processes box
+theme[selected_fg]="#0c0b0c"
+
+# Color of inactive/disabled text
+theme[inactive_fg]="#584e51"
+
+# Color of text appearing on top of graphs
+theme[graph_text]="#e2dddc"
+
+# Background color of the percentage meters
+theme[meter_bg]="#1e1d1e"
+
+# Misc colors for processes box
+theme[proc_misc]="#e2dddc"
+
+# CPU, Memory, Network, Proc box outline colors
+theme[cpu_box]="#584e51"
+theme[mem_box]="#584e51"
+theme[net_box]="#584e51"
+theme[proc_box]="#584e51"
+
+# Box divider line and small boxes line color
+theme[div_line]="#6B5E73"
+
+# Temperature graph color (Green -> Yellow -> Red)
+theme[temp_start]="#87a9b0"
+theme[temp_mid]="#6B5E73"
+theme[temp_end]="#c38b7b"
+
+# CPU graph colors (Blue -> Cyan -> Magenta)
+theme[cpu_start]="#b59790"
+theme[cpu_mid]="#a5a0b6"
+theme[cpu_end]="#c4d8e2"
+
+# Mem/Disk free meter (Reversed "Available" colors: Cyan -> Blue -> Purple)
+theme[free_start]="#c4d8e2"
+theme[free_mid]="#b59790"
+theme[free_end]="#6B5E73"
+
+# Mem/Disk cached meter
+theme[cached_start]="#b59790"
+theme[cached_mid]="#c4d8e2"
+theme[cached_end]="#e2dddc"
+
+# Mem/Disk available meter (Purple -> Blue -> Cyan)
+theme[available_start]="#6B5E73"
+theme[available_mid]="#b59790"
+theme[available_end]="#a5a0b6"
+
+# Mem/Disk used meter
+theme[used_start]="#c38b7b"
+theme[used_mid]="#6B5E73"
+theme[used_end]="#584e51"
+
+# Download graph colors
+theme[download_start]="#87a9b0"
+theme[download_mid]="#a5a0b6"
+theme[download_end]="#cfd3cd"
+
+# Upload graph colors
+theme[upload_start]="#b59790"
+theme[upload_mid]="#c4d8e2"
+theme[upload_end]="#e2dddc"
+
+# Process box color gradient
+theme[process_start]="#c4d8e2"
+theme[process_mid]="#a5a0b6"
+theme[process_end]="#c38b7b"
+
+# Graph gradient colors
+theme[gradient_color_0]="#0c0b0c"
+theme[gradient_color_1]="#584e51"
+theme[gradient_color_2]="#6B5E73"
+theme[gradient_color_3]="#c38b7b"
+theme[gradient_color_4]="#87a9b0"
+theme[gradient_color_5]="#b59790"
+theme[gradient_color_6]="#a5a0b6"
+theme[gradient_color_7]="#FAFCFB"

themes/last-horizon/chromium.theme

@@ -0,0 +1 @@
+12,11,12

themes/last-horizon/colors.toml

@@ -0,0 +1,34 @@
+mode = "dark"
+
+accent = "#b59790"
+selection = "#584e51"
+muted = "#584e51"
+
+background = "#0c0b0c"
+dark_background = "#090809"
+darker_background = "#060606"
+lighter_background = "#0c0b0c"
+
+foreground = "#FAFCFB"
+dark_foreground = "#584e51"
+light_foreground = "#cfd3cd"
+bright_foreground = "#e2dddc"
+
+hyprland_active_border = "rgba(8a8588ee) rgba(e2dddcee)"
+hyprland_inactive_border = "rgba(584e51aa)"
+active_border_color = "#d6d3de"
+active_tab_background = "#a5a0b6"
+
+red = "#c38b7b"
+yellow = "#6B5E73"
+green = "#87a9b0"
+cyan = "#a5a0b6"
+blue = "#b59790"
+magenta = "#c4d8e2"
+
+bright_red = "#c38b7b"
+bright_yellow = "#6B5E73"
+bright_green = "#87a9b0"
+bright_cyan = "#a5a0b6"
+bright_blue = "#b59790"
+bright_magenta = "#c4d8e2"

themes/last-horizon/hyprland.lua

@@ -0,0 +1,17 @@
+local active_border_color = { colors = { "rgba(8a8588ee)", "rgba(e2dddcee)" }, angle = 45 }
+local inactive_border_color = "rgba(584e51aa)"
+
+hl.config({
+  general = {
+    col = {
+      active_border = active_border_color,
+      inactive_border = inactive_border_color,
+    },
+  },
+  group = {
+    col = {
+      border_active = active_border_color,
+      border_inactive = inactive_border_color,
+    },
+  },
+})

themes/last-horizon/icons.theme

@@ -0,0 +1 @@
+Yaru-purple

themes/last-horizon/vscode.json

@@ -0,0 +1,4 @@
+{
+  "name": "Ship at Sea",
+  "extension": "rikkarth.ship-at-sea"
+}