fix(organizeImport): ignore side effect imports

[Conaclos]

Summary

Fix #817

Now every side effect import creates its own import group.

Test Plan

I added a test.

[codspeed-hq]

CodSpeed Performance Report

Merging #2563 will improve performances by 7.27%

_{Comparing conaclos/817/ignore-side-effect-imports (3dbd546) with main (b150000)}

Summary

⚡ 1 improvements
✅ 92 untouched benchmarks

Benchmarks breakdown

	Benchmark	main	conaclos/817/ignore-side-effect-imports	Change
⚡	db.json[uncached]	86 ms	80.2 ms	+7.27%

[ematipico]

That was a very clever fix!