Adjust tailwind content globs (#29596)

Tailwind content is not going to appear in `web_src/css`,
`web_src/fomantic` or `web_src/svg` or the JSON templates, so we don't
need to have tailwind scan these directories which will speed up the
build.

---------

Co-authored-by: delvh <[email protected]>

Author: silverwind

tailwind.config.js

@@ -29,8 +29,10 @@ export default {
   content: [
     isProduction && '!./templates/devtest/**/*',
     isProduction && '!./web_src/js/standalone/devtest.js',
+    '!./templates/swagger/v1_json.tmpl',
+    '!./templates/user/auth/oidc_wellknown.tmpl',
     './templates/**/*.tmpl',
-    './web_src/**/*.{js,vue}',
+    './web_src/js/**/*.{js,vue}',
   ].filter(Boolean),
   blocklist: [
     // classes that don't work without CSS variables from "@tailwind base" which we don't use