[WIP] Revisions on the website are in reverse order

[Copilot]

Thanks for assigning this issue to me. I'm starting to work on it and will keep this PR's description up to date as I form a plan and make progress.

Original issue description:

Cabal file revisions as listed on the website are in reverse order with respect to the metadata.

E.g. _sources/strict-checked-vars/0.2.0.0/revisions/1.cabal gets published as package/strict-checked-vars-0.2.0.0/revision/3.cabal and _sources/strict-checked-vars/0.2.0.0/revisions/3.cabal gets published as package/strict-checked-vars-0.2.0.0/revision/1.cabal.

λ curl --silent https://raw.githubusercontent.com/IntersectMBO/cardano-haskell-packages/725c0de9b52cbe85c930b6a16f579af370d6e735/_sources/strict-checked-vars/0.2.0.0/revisions/1.cabal | sha256sum -
bc3a3c3265bb66f2d495d5aeb0ba968f87cddc27ae96183b9258c182836afc39  -
λ curl --silent https://chap.intersectmbo.org/package/strict-checked-vars-0.2.0.0/revision/3.cabal | sha256sum -
bc3a3c3265bb66f2d495d5aeb0ba968f87cddc27ae96183b9258c182836afc39  -

λ curl --silent https://raw.githubusercontent.com/IntersectMBO/cardano-haskell-packages/725c0de9b52cbe85c930b6a16f579af370d6e735/_sources/strict-checked-vars/0.2.0.0/revisions/3.cabal | sha256sum -
8154f375c555b58a558cd136077e0b7034c7e029f2c148a555a5f8f26acc07e2  -
λ curl --silent https://chap.intersectmbo.org/package/strict-checked-vars-0.2.0.0/revision/1.cabal | sha256sum -
8154f375c555b58a558cd136077e0b7034c7e029f2c148a555a5f8f26acc07e2  -

This has (mostly) gone unnoticed because it only affects those who rely on the website for the metadata, rather than 01-index.tar.gz.

Fixes #106.

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