Semi-unrelated and noAllow command aliases to be defined in the config file like `git` does

Semi-unrelated and not blocking, but I wonder if at some point we'll want to allow command aliases to be defined in the config file like `git` does, which might mitigate this if the command has options that mimic the symlinks (most do because of Windows).

_Originally posted by @geekosaur in https://github.com/haskell/cabal/pull/11295#discussion_r2535009354_

No file, test, or entry point is named. Start by reviewing how cabal-install parses configuration and dispatches commands, then establish the expected alias behavior and test scope before implementation.

Written by the indexing model from the issue text.