fix(css_formatter): fix CSS formatter converts variable declarations and function calls to lowercase #3068

[denbezrukov]

Summary

Fix #3068

We have several ways to prevent case changes while formatting:

1. We use custom identifiers during parsing.
2. We pass parameters to the identifier formatter to prevent parsing.

However, using custom identifiers in places where they aren't specified as part of the specification may not be ideal. So I avoid that places and pass a parameter for a formatter.

Test Plan

cargo test

[denbezrukov]

It might be a good rule to highlight incorrect cases for widely used functions.
cc @togami2864

[codspeed-hq]

CodSpeed Performance Report

Merging #3130 will degrade performances by 6.71%

_{Comparing fit/case-sensitive (35f93bb) with main (2f4997b)}

Summary

❌ 1 regressions
✅ 91 untouched benchmarks

⚠️ Please fix the performance issues or acknowledge them on CodSpeed.

Benchmarks breakdown

	Benchmark	main	fit/case-sensitive	Change
❌	dojo.js[uncached]	8.9 ms	9.5 ms	-6.71%