Ghci Script Target parses space in Filepath with space

[fendor]

Issue in hie: haskell/haskell-ide-engine#1669

Example: some ghci script:

:add Lib Lib2 "/home/user/Has kell/Test.hs"

is wrongfully parsed into targets: ["Lib", "Lib2", "\"home/user/Has", "kell/Test.hs\""].

Offending code: https://github.com/mpickering/hie-bios/blob/9fd8af352317490f1c68cb628b2ce2a8733b63e5/src/HIE/Bios/Environment.hs#L223

[fendor]

Proposed Solution: use attoparsec to parse these targets correctly.

attoparsec is already in the project dependency closure.

[fendor]

For Documentation:
This happens when we are using a Stack cradle and have a executable component.
Assuming we have only an executable, then stack will produce a ghci-script with the following contents:

:add "<root-path>/Main.hs"

We parse this ghci-script to extract targets that we can load.

The previous parsing logic just used words to split this line into targets that we can load.
However, this breaks if the path contains a space.
The patch in #163 uses the parser from base to parse whitespace within quotes and allow escaped ".