chore: Add readme and benchmeme

README.md

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+### reading csv's
+
+How to benchmark:
+
+- There is a test in the `main_test.go` file containing a benchmark loop
+- run the command `go test -bench . -run ^$` to run only the benchmark test
+- you can make the bench tool run more iterations of the benchmark using a flag on the command:
+`go test -bench .  -benchtime10x -run ^$`
+
+- to profile the program run `go test -bench . -benchtime=10x -run ^$ -cpuprofile cpu00.pprof`
+The above command will generate two files that will be used for profiling the program
+
+To use the generated files for profiling you have to run:
+`go tool pprof cpu00.pprof`
+
+This will start an interactive cli session where you can view more details about the functions running in the program
+Inside that interactive cli session you can use the `top` and `list` commands to see details of the functions that are running

benchmem.txt

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+goos: linux
+goarch: amd64
+pkg: github.com/Serares/coolStats
+BenchmarkRun-16    	      10	 326381958 ns/op	495568278 B/op	 5041037 allocs/op
+PASS
+ok  	github.com/Serares/coolStats	3.596s