Add parse benchmark #145

Job	Run time
Document	20s
Gem: 3.0 on ubuntu-latest	12s
Gem: head on ubuntu-latest	9s
Gem: 3.0 on macos-latest	19s
Gem: head on macos-latest	17s
Gem: 3.0 on windows-latest	1m 18s
Gem: head on windows-latest	53s
ruby-versions / Generate Ruby versions	4s
Inplace: 2.5 on ubuntu-latest	21s
Inplace: 2.6 on ubuntu-latest	23s
Inplace: 2.7 on ubuntu-latest	26s
Inplace: 3.0 on ubuntu-latest	13s
Inplace: 3.1 on ubuntu-latest	13s
Inplace: 3.2 on ubuntu-latest	11s
Inplace: 3.3 on ubuntu-latest	14s
Inplace: head on ubuntu-latest	14s
Inplace: jruby on ubuntu-latest	41s
Inplace: jruby-head on ubuntu-latest	39s
Inplace: 2.5 on macos-latest	50s
Inplace: 2.6 on macos-latest	49s
Inplace: 2.7 on macos-latest	45s
Inplace: 3.0 on macos-latest	30s
Inplace: 3.1 on macos-latest	23s
Inplace: 3.2 on macos-latest	19s
Inplace: 3.3 on macos-latest	1m 7s
Inplace: head on macos-latest	24s
Inplace: jruby on macos-latest	51s
Inplace: jruby-head on macos-latest	47s
Inplace: 2.5 on windows-latest	2m 18s
Inplace: 2.6 on windows-latest	3m 28s
Inplace: 2.7 on windows-latest	1m 49s
Inplace: 3.0 on windows-latest	1m 47s
Inplace: 3.1 on windows-latest	1m 28s
Inplace: 3.2 on windows-latest	1m 33s
Inplace: 3.3 on windows-latest	1m 21s
Inplace: head on windows-latest	57s
Inplace: jruby on windows-latest	2m 4s
Inplace: jruby-head on windows-latest	1m 49s
	32m 26s

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