perf(styles): compress distributed global stylesheets (#29275)

Issue number: N/A

---------

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## What is the current behavior?
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Ionic Framework developers make extensive use of multi-line comments in
the Sass files. However these comments are not stripped from the
generated output.

This leads to a significant increase to the file size of CSS and can
have an impact on runtime performance.

For example: https://cdn.jsdelivr.net/npm/@ionic/core/css/core.css has
183 lines of comment blocks before a single line of CSS.

## What is the new behavior?
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this PR. -->

- Compresses the generated output from Sass → CSS to strip out
multi-line comment blocks.
- Developers can use [loud
comments](https://sass-lang.com/documentation/syntax/comments/) if they
want to include comments in the generated output.
- In the case of just the core.css file, the file size goes from 20kb to
10kb.
  - The entire CSS global styles goes from 758 KB to 606kb.

## Does this introduce a breaking change?

- [ ] Yes
- [x] No

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## Other information

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screenshots of how the component looks before and after the change. -->

Dev-build: `7.8.4-dev.11712251308.1da8aede`

core/package.json

@@ -77,7 +77,7 @@
     "build.docs.json": "stencil build --docs-json dist/docs.json",
     "clean": "node scripts/clean.js",
     "css.minify": "cleancss -O2 -o ./css/ionic.bundle.css ./css/ionic.bundle.css",
-    "css.sass": "sass --embed-sources src/css:./css",
+    "css.sass": "sass --embed-sources --style compressed src/css:./css",
     "eslint": "eslint src",
     "lint": "npm run lint.ts && npm run lint.sass && npm run prettier -- --write --cache",
     "lint.fix": "npm run lint.ts.fix && npm run lint.sass.fix && npm run prettier -- --write --cache",