Remove pages from frontend bundle

[MartinSStewart]

These changes should prevent code in the pages field from getting bundled with the frontend

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🔨 Latest commit	6cdb1c8465e7cd035736d2a150be77226334e62f

[dillonkearns]

Thanks for the PR! It's close, getting this failure in the CI:

-- TYPE MISMATCH --------------- /home/runner/work/elm-pages/elm-pages/examples/routing/elm-stuff/elm-pages/client/app/Route/Date/SPLAT_.elm
The 1st argument to `preRender` is not what I expect:

31|     RouteBuilder.preRender
32|>        { head = head
33|>        , pages = \_ -> BackendTask.fail (FatalError.fromString "")
34|>        , data = \_ -> BackendTask.fail (FatalError.fromString "")
35|>        }

This argument is a record of type:

    { data : RouteParams -> BackendTask FatalError Data
    , head : App Data ActionData RouteParams -> List Head.Tag
    , pages : b -> BackendTask FatalError a
    }

But `preRender` needs the 1st argument to be:

    { data : RouteParams -> BackendTask FatalError Data
    , head : App Data ActionData RouteParams -> List Head.Tag
    , pages : BackendTask FatalError (List RouteParams)
    }

So it shouldn't have a lambda parameter for the case of the pages record field.

Also, I'd like to have a test case to reflect this in https://github.com/dillonkearns/elm-pages/blob/6cdb1c8465e7cd035736d2a150be77226334e62f/generator/dead-code-review/tests/Pages/Review/DeadCodeEliminateDataTest.elm before merging and shipping this.

[MartinSStewart]

Sorry about the delayed response. I ran into issues when trying to run the elm-pages tests (Windows line-endings causing trouble) so I switched to my mac and then ran into NPM issues there. I've lost motivation to solve this so it's probably best to just close this PR.

[dillonkearns]

Hey @MartinSStewart, thanks for letting me know!

I'll leave this open for a bit in case anybody wants to try to pick it up. Would be a great one for someone to try to contribute I think, and this would be a very nice improvement. Thanks for getting the ball rolling on this! I'll close it if it's stale after a while.