Refacto palette and theme, added more colors

lua/astrobox/palette/init.lua

@@ -0,0 +1,44 @@
+---@class Palette : Colors
+---@field none string
+---@field fg string
+---@field bg string
+---@field harder_bg string
+---@field softer_bg string
+---@field bg_gradiant table
+---@field fg_gradiant table
+---@field colored_backgrounds Colors
+---@field term_colors Colors
+---@field gray string
+
+local colors = require("astrobox.palette.colors")
+
+-- TODO Split into palette and theme (float, bars)?
+
+--- @return Palette
+return function(config)
+    local vimbg = vim.o.background
+    local dark = vimbg == "dark"
+    local vimbg_reversed = dark and "light" or "dark"
+
+    -- Build base colors
+    local base = {
+        none = colors.none,
+        fg = colors.grayscale[vimbg_reversed][1],
+        bg = colors.bg[vimbg][config.contrast],
+
+        harder_bg = colors.bg.harder[vimbg][config.contrast],
+        softer_bg = colors.bg.softer[vimbg][config.contrast],
+
+        bg_gradiant = colors.grayscale[vimbg],
+        fg_gradiant = colors.grayscale[vimbg_reversed],
+
+        colored_backgrounds = colors.colored_backgrounds[vimbg][config.contrast],
+        term_colors = colors.term_colors,
+
+        gray = colors.gray,
+    }
+    -- Append colors
+    local palette = vim.tbl_extend("error", base, colors.colors[vimbg])
+
+    return palette
+end