chore(benchmarks): running benchmarks and adding results to the repo

tests/benchmarks/README.md

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+# Benchmarks
+
+## Running the benchmarks and storing the results
+
+1. Run for the repository root
+2. Make sure the target `arkscript` has been compiled in release mode, as well as `bench`
+```bash
+result="tests/benchmarks/results/$(set -- tests/benchmarks/results/*.csv; echo $#)-$(git rev-parse --short HEAD).csv"
+cmake-build-release/bench \
+  --benchmark_min_warmup_time=1 \
+  --benchmark_format=csv \
+  --benchmark_time_unit=ms \
+  --v=0 | grep -Ev "(New parser|Welder)" > $result
+```
+
+## Generate the comparison
+
+```bash
+python3 tests/benchmarks/compare.py tests/benchmarks/results/*.csv
+```

tests/benchmarks/results/5-ee9ff764.csv

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+name,iterations,real_time,cpu_time,time_unit,bytes_per_second,items_per_second,label,error_occurred,error_message
+"quicksort",4601,0.150416,0.150228,ms,,,,,
+"ackermann/iterations:50",50,59.9067,59.8294,ms,,,,,
+"fibonacci/iterations:100",100,6.27221,6.26509,ms,,,,,
+"man_or_boy",45605,0.0153367,0.015325,ms,,,,,