feat: replacing windicss by tailwindcss in hoppscotch-ui (#3076)

Co-authored-by: Andrew Bastin <andrewbastin.k@gmail.com>
Co-authored-by: Joel Jacob Stephen <70131076+JoelJacobStephen@users.noreply.github.com>
Co-authored-by: nivedin <nivedinp@gmail.com>

packages/hoppscotch-selfhost-web/postcss.config.cjs

@@ -0,0 +1,7 @@
+const postcssConfig = require("@hoppscotch/ui/postcss.config")
+
+const config = {
+  ...postcssConfig,
+}
+
+module.exports = config