Add basic benchmark (#3038)

* Add basic benchmark

* Add basic documentation for how to run and add tests/benchmarks

* Update benchmark example output

* Add changelog entry

Co-authored-by: zneix <zneix@zneix.eu>

benchmarks/.clang-format

@@ -0,0 +1,35 @@
+Language: Cpp
+
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+BasedOnStyle: Google
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+}
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+Standard: Auto
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