Add purify theme (#157)

* Add purify theme

* Improve purify.lua

---------

Co-authored-by: Sidhanth Rathod <siduck@tutanota.com>

lua/base46/themes/purify.lua

@@ -0,0 +1,62 @@
+-- Credits to https://github.com/kyoz/purify for existing 
+-- this is a modified version of it
+
+local M = {}
+
+M.base_30 = {
+  white = "#FAFAFA",
+  darker_black = '#121b24',
+  black = "#151F29", -- nvim bg
+  black2 = "#1b2835",
+  one_bg = "#213141",
+  one_bg2 = "#293c4f",
+  one_bg3 = "#334c64",
+  grey = "#36506a",
+  grey_fg = "#3e5b79",
+  grey_fg2 = "#47698b",
+  light_grey = "#4c7094",
+  red = "#FF6059",
+  baby_pink = "#FF88D5",
+  pink = "#FF79C6",
+  line = "#2A3441",
+  green = "#5FFF87",
+  vibrant_green = "#6AD4D6",
+  blue = "#5FAFFF",
+  nord_blue = "#52a2f2",
+  yellow = "#FFFF87",
+  sun = "#FFFF8F",
+  purple = "#AF87FF",
+  dark_purple = "#A070FF",
+  teal = "#5CC6C8",
+  orange = "#FF875F",
+  cyan = "#69C3FF",
+  statusline_bg = "#202A37",
+  lightbg = "#313B48",
+  pmenu_bg = "#5FAFFF",
+  folder_bg = "#5FAFFF",
+}
+
+M.base_16 = {
+  base00 = "#151F29",
+  base01 = "#252F3C",
+  base02 = "#313B48",
+  base03 = "#3D4754",
+  base04 = "#565C64",
+  base05 = "#EBEBEB",
+  base06 = "#F5F5F5",
+  base07 = "#FAFAFA",
+  base08 = "#FF79C6",
+  base09 = "#FF875F",
+  base0A = "#FFFF87",
+  base0B = "#5FFF87",
+  base0C = "#69C3FF",
+  base0D = "#5FAFFF",
+  base0E = "#AF87FF",
+  base0F = "#FF6059",
+}
+
+M.type = "dark"
+
+M = require("base46").override_theme(M, "purify")
+
+return M