More benchmarks (haskell#625)

* Add a benchmark to track startup times

* Benchmark automation

disable benchmarks easily

save GC stats to file

cradle, rts, filter and samples options

path to ghcide

configurable example

--help

more detailed CSV output

hover after edit

pause for GC

configurable timeout

upgrade extra (required to build bench)

Include max residency in BenchRun

Include all details on output

* reduce threadDelay to avoid upsetting lsp-test

* Fix startup time measurement

* Added new edit experiment

* fix doc comment

* hlints

* Upgrade to lsp-test 0.11.0.2

* Flag failed experiments

* Update ghcide.cabal