Include components directory in stylesheet linting

[aduth]

🛠 Summary of changes

Includes stylesheets located within the app/components directory for linting.

This matches build sources:

identity-idp/package.json

Line 21 in 4c96efb

"build:css": "build-sass app/assets/stylesheets/*.css.scss app/components/*.scss --load-path=app/assets/stylesheets --out-dir=app/assets/builds"

See previous discussion: #9840 (comment)

📜 Testing Plan

Verify lint:css passes.

For bonus points, introduce a stylistic error to a .scss file within app/components and verify the same command fails.

Example:

diff --git a/app/components/captcha_submit_button_component.scss b/app/components/captcha_submit_button_component.scss
index 545f6b084..83a8d8851 100644
--- a/app/components/captcha_submit_button_component.scss
+++ b/app/components/captcha_submit_button_component.scss
@@ -2,2 +2,3 @@
   visibility: hidden;
+  
 }

$ yarn lint:css                       
yarn run v1.22.19
$ stylelint 'app/assets/stylesheets/**/*.scss' 'app/javascript/**/*.scss' 'app/components/*.scss'

app/components/captcha_submit_button_component.scss
 3:1  ✖  Delete "··⏎"  prettier/prettier

1 problem (1 error, 0 warnings)

error Command failed with exit code 2.