* Add `cabal-version` 3.12

* Add test for #9331

- `cabal check`: Guard Paths_* behind `cabal-version: 3.12` or higher,
  “fail” and “succeed” tests.
- `cabal build`: Guard Paths_* behind `cabal-version: 3.12` or higher,
  “fail” test.

* Guard PackageInfo behind cabal-version ≥ 3.12

---------

Co-authored-by: mergify[bot] <37929162+mergify[bot]@users.noreply.github.com>

* Do not ask overwrite questions for empty dirs

See #9150, blank projects need not to ask permission to
overwrite files.

* Fix tests

"test-dir" [] are the mock calls to `getPackageDir` and `listDirectory`

Add maybe in guess functions

Adjust type in NonInteractive

Change unit tests

Fix whitespace

Abstract guessing and remove comments

Simplify guess functions

Return default for cabal init author and name when git fails

* (cabal init) make BSD-3-Clause default

* Add changelog for #8757

* Modify test to incorporate new BDS-3 default

---------

Co-authored-by: mergify[bot] <37929162+mergify[bot]@users.noreply.github.com>

* Fix cabal init should not suggest Cabal < 2.0

* Remove + symbol cabal-version 2.0

* cabal init -i should sanitize suggested package name (fix #8404)

* fix existing tests

* fix more tests (golden)

* fix more tests (generators, simple)

* add regression test

* add changelog

Co-authored-by: mergify[bot] <37929162+mergify[bot]@users.noreply.github.com>

Fixes #8254

Co-authored-by: mergify[bot] <37929162+mergify[bot]@users.noreply.github.com>

* Remove alphanum check from language prompt

* Remove unneded whitespace

* Add changelog for #8281

Co-authored-by: mergify[bot] <37929162+mergify[bot]@users.noreply.github.com>

* cabal init -i should autodetect author name and maintainer email (fix #8255)

Name and email are fetched from git config in the non-interactive init
already, and we plug that utility into the interactive one in this commit.

Testing becomes clunkier: the list of inputs have to hold an additional
string that will be used as the return value of
`Interactive.readProcessWithExitCode`, and here is why. Recall that this
method is used to call `git config` to perform autodetection. In the
real scenario (the `IO` instance of `Interactive`), it actually calls
out to `git`. In the testing scenario (the `PurePrompt` instance of
`Interactive`), the method simply returns the next element of the list
of pre-defined inputs. So, the list of inputs to every relevant test has
to be adjusted.

* Add test checking that username/email can be autodetected

After discussion in #hackage it seemed prudent to add some minimal
explanation of what a valid SPDX identifier might look like in the error
message.

* add baseDep to simple project generation

* refine the base dep getting

* Restructures the `cabal init` command to fix historical
  issues. All flags are preserved.
  * Codebases for interactive and non-interactive flags
    are disentangled.
  * Data structures now exploit relevant stanza structure
    and formatters only care about stanza data
  * Heuristics and prompts have a pure and impure implementation.

* Sets default behavior to be `--interactive` as opposed to
  `--non-interactive`.

* Rewrites tests to achieve 98% coverage
  * Golden files now test every stanza individually
  * Every flag is covered by a unit test
  * Interactive, simple, and non-interactive workflows are
    covered.