rename test for generic color

[natemoo-re]

reorganize the test from #62 into a color-focused test

[pkg-pr-new]

Open in StackBlitz

npm i https://pkg.pr.new/clayterm@88

commit: 7f36d1d

[codspeed-hq]

Merging this PR will degrade performance by 54.45%

❌ 1 (👁 1) regressed benchmark
✅ 22 untouched benchmarks

Performance Changes

	Mode	Benchmark	BASE	HEAD	Efficiency
👁	Simulation	long input burst (200 bytes)	576.1 µs	1,264.9 µs	-54.45%

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_{Comparing test-color (7f36d1d) with main (48ff4bb)}