feature(top langs card): add ability to change progress bar background color in normal layout (#16)

* #3307 enhancement : prog_bg_color query added to change the background of progress bar

* #3066 bug Fixed : readme.md file as stated

* #3066 bug Fixed : readme.md file as stated"

* #3066 bug Fixed : readme.md file as stated

* fix types.d.ts

* add test

---------

Co-authored-by: krishnoit <krishnoit100@gmail.com>
Co-authored-by: krishna seth <75961965+a-s-t-e-y-a@users.noreply.github.com>

api/top-langs.js

@@ -28,6 +28,7 @@ export default async (req, res) => {
     title_color,
     text_color,
     bg_color,
+    prog_bar_bg_color,
     theme,
     cache_seconds,
     layout,
@@ -143,6 +144,7 @@ export default async (req, res) => {
         title_color,
         text_color,
         bg_color,
+        prog_bar_bg_color,
         theme,
         layout,
         langs_count,