Added tokyonight theme

Added colorscheme variable to opts file

lua/taken/opts.lua

@@ -1,6 +1,11 @@
 local g = vim.g
 local o = vim.o
 local opt = vim.opt
+local cmd = vim.cmd
+
+local colorscheme = "tokyonight"
+
+cmd("colorscheme " .. colorscheme)
 
 g.mapleader = " "