`cabal init` should mostly (only?) use defaults instead of asking.

For my whole `Cabal` life I've been asked to select options I don't care about. Hundreds of times really if not into the thousands by now.

I've developed an adverse feeling about cabal init to the point where I wonder "Is it worth being interrogated like this? Should I maybe just copy an existing .cabal file and manually update every single field instead?"

Therefore I request humbly: **cabal init should mostly go with defaults and ask less questions.**

I think there are two kinds of things cabal init asks about:

* Things cabal check should ask if not specified that can be there as a comment.
* Things I will never care much about and if I do I will just edit the .cabal file.

To go through them:

* Cabal specification? I never cared just give me the newest. If I care about backwards compatibility I will set it as old as I can manually.
* Package version? 0.1.0.0 is fine. If I'm going to release it I will change it manually anyway.
* License? I'm not a lawyer. People who don't care are probably just hitting enter. People who do probably use GPL* so maybe okay with a default.
* Author Name? Should be in cabal check probably.
* Email/Homepage? If the project is good enough to deserve one surely you can afford to manually enter it in the .cabal file.
* Category? Just remind me when I do cabal check.
* Synopsis? We have types for that. (Actualy: Remind me during cabal check)
* Main module? Literate programming isn't due a resurgence for another 10 years. Just use Main.hs
* source folder? If I care it won't be one of the suggestions anyway so just pick one for me.
* Language? Maybe worth chosing, but default could be GHC2021 by now.

For any reasonably complex project I will be editing the .cabal file anyway. So I don't care *that* much about the actual choice `cabal init` makes. I just use it so I don't have to remind myself if it was `ghc-options` or `options-ghc` again.

I'm not sure what others feeling about this are. But today I had to do `cabal init` twice in a row and I finally got annoyed enough to try and enact change.