chore(theme): add light and dark catppuccin themes with fix for contrast (#2376)

* Add light and dark Catppuccin themes, #1977

"Catppuccin Latte" and "Catppuccin Mocha" come from the official Catppuccin theme, available here: https://github.com/catppuccin/github-readme-stats

* Change Latte title color to pass AA contrast ratio test

themes/index.js

@@ -395,6 +395,18 @@ export const themes = {
     text_color: "e0def4",
     bg_color: "191724",
   },
+  catppuccin_latte: {
+    title_color: "137980",
+    icon_color: "8839ef",
+    text_color: "4c4f69",
+    bg_color: "eff1f5",
+  },
+  catppuccin_mocha: {
+    title_color: "94e2d5",
+    icon_color: "cba6f7",
+    text_color: "cdd6f4",
+    bg_color: "1e1e2e",
+  },
   date_night: {
     title_color: "DA7885",
     text_color: "E1B2A2",