refactor: remove deprecated Shipwright export system

Remove entire _exported_themes directory and OasisExport command to
simplify codebase. The theme now uses direct highlight application
via vim.api.nvim_set_hl() making external export tools unnecessary.

Author: uhs-robert

_exported_themes/colors/0_template.lua

@@ -51,80 +51,5 @@ end, {
 	end,
 })
 
--- :OasisExport command to export colorschemes using Shipwright
-vim.api.nvim_create_user_command("OasisExport", function(opts)
-	local args = vim.split(opts.args, "%s+")
-	local action = args[1] or "all"
-
-	local exporter = require("_exported_themes.export_all")
-
-	if action == "all" then
-		-- Export all palettes in Lua format
-		exporter.export_lua_all()
-	elseif action == "both" then
-		-- Export all palettes in both Lua and VimScript formats
-		exporter.export_both_formats()
-	elseif action == "list" then
-		-- List available palettes
-		local palettes = exporter.list_palettes()
-		print("Available palettes:")
-		for _, palette in ipairs(palettes) do
-			print("  " .. palette)
-		end
-	elseif action and action ~= "" then
-		-- Export specific palette
-		local format = args[2] or "lua"
-		exporter.export_single(action, format)
-	else
-		print("Usage: :OasisExport [all|both|list|<palette_name> [lua|vim]]")
-		print("  all  - Export all palettes as Lua files")
-		print("  both - Export all palettes as both Lua and VimScript files")
-		print("  list - List available palette names")
-		print("  <palette_name> [format] - Export specific palette (default: lua)")
-	end
-end, {
-	nargs = "*",
-	complete = function(arglead, cmdline, cursorpos)
-		local args = vim.split(cmdline, "%s+")
-		local arg_count = #args
-
-		-- Account for incomplete arguments
-		if cmdline:match("%s$") then
-			arg_count = arg_count + 1
-		end
-
-		if arg_count == 2 then
-			-- First argument: action or palette name
-			local actions = { "all", "both", "list" }
-			local exporter = require("_exported_themes.export_all")
-			local palettes = exporter.list_palettes()
-
-			local completions = {}
-			for _, action in ipairs(actions) do
-				if action:find("^" .. vim.pesc(arglead)) then
-					table.insert(completions, action)
-				end
-			end
-			for _, palette in ipairs(palettes) do
-				if palette:find("^" .. vim.pesc(arglead)) then
-					table.insert(completions, palette)
-				end
-			end
-			return completions
-		elseif arg_count == 3 then
-			-- Second argument: format (only for specific palette)
-			local formats = { "lua", "vim" }
-			local completions = {}
-			for _, format in ipairs(formats) do
-				if format:find("^" .. vim.pesc(arglead)) then
-					table.insert(completions, format)
-				end
-			end
-			return completions
-		end
-
-		return {}
-	end,
-})
 
 return M