fix: #429 respin making reader.read respect context closure

[zekth]

fix: #428

This is a respin of #429 with added benchmarks like the review asked for.

MAIN
BenchmarkReaderClose-14    	       1	1001178125 ns/op	   55016 B/op	     429 allocs/op

Branch
BenchmarkReaderClose-14                1        1001329375 ns/op           56120 B/op        434 allocs/op

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Error parsing command: EOF found when expecting closing quote

[zekth]

@achille-roussel could you please look at this?

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Atlantis commands can't be run on fork pull requests. To enable, set --allow-fork-prs or, to disable this message, set --silence-fork-pr-errors

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Error parsing command: EOF found when expecting closing quote