Rename examples/evm -> examples/zkevm-demo

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Benchmark for Linux-cuda 55e5b03

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Test	Base	PR	%
fib/100/execute	17.4±0.56ms	17.2±0.44ms	-1.15%
fib/100/prove	909.6±11.86ms	902.2±6.07ms	-0.81%
fib/100/total	930.5±9.24ms	925.1±8.30ms	-0.58%
fib/1000/execute	33.4±0.64ms	33.4±0.56ms	0.00%
fib/1000/prove	938.0±6.95ms	934.5±8.73ms	-0.37%
fib/1000/total	982.4±6.32ms	963.2±11.02ms	-1.95%
fib/10000/execute	195.6±2.91ms	193.9±1.93ms	-0.87%
fib/10000/prove	3.5±0.10s	3.5±0.02s	0.00%
fib/10000/total	3.7±0.04s	3.7±0.02s	0.00%

Benchmark for Linux-default

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Benchmark for macOS-default

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Benchmark for macOS-metal

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