fix: remove stray Leaf\Console\Utils\Package copied from leafs/cli

[mychidarko]

Fixes leafsphp/cli#23.

Problem

src/Utils/Package.php in this repo declares namespace Leaf\Console\Utils; — the leafs/cli namespace, not alchemy's (Leaf\Alchemy\). When both packages are installed in the same project and composer builds an optimized classmap, it finds the class twice:

Warning: Ambiguous class resolution, "Leaf\Console\Utils\Package" was found in both
"…/leafs/alchemy/src/Utils/Package.php" and "…/leafs/cli/src/Utils/Package.php",
the first will be used.

Whichever copy wins, cli may end up running alchemy's version — which reads alchemy's composer.json for the version number and fetches leafs/cli.json from packagist.

Why it's safe to delete

• The file is a leftover copy of cli's Package.php (it even fetches https://repo.packagist.org/p2/leafs/cli.json).
• Its namespace doesn't match alchemy's PSR-4 root, so alchemy's own autoloader never loads it — it's only ever discovered by classmap generation.
• Nothing in alchemy references Package (grep -rn Package src tests bin → only this file).

Verification

• alchemy test: 46 passed (197 assertions) with the file removed.
• composer dump-autoload -o: Leaf\Console\Utils\Package no longer appears in alchemy's classmap.