Rename AtMostBabbageEra to ShelleyToBabbageEra

[newhoggy]

Changelog

- description: |
    Rename `AtMostBabbageEra` to `ShelleyToBabbageEra` and add `FeatureInEra` instances to `ShelleyToBabbageEra` and `ConwayEraOnwards`.
  compatibility: breaking
  type: feature

Context

The name ShelleyToBabbageEra more explicitly notes the absence of Byron and sets up the naming convention that allows for a starting era other than Shelley.

Checklist

• Commit sequence broadly makes sense and commits have useful messages
• The change log section in the PR description has been filled in
• New tests are added if needed and existing tests are updated. These may include:
  • golden tests
  • property tests
  • roundtrip tests
• The version bounds in .cabal files are updated
• CI passes. See note on CI. The following CI checks are required:
  • Code is linted with hlint. See .github/workflows/check-hlint.yml to get the hlint version
  • Code is formatted with stylish-haskell. See .github/workflows/stylish-haskell.yml to get the stylish-haskell version
  • Code builds on Linux, MacOS and Windows for ghc-8.10.7 and ghc-9.2.7
• The changelog section in the PR is updated to describe the change
• Self-reviewed the diff

Note on CI

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You will need to get someone with write privileges. Please contact IOG node developers to do this
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[Jimbo4350]

Are these in use?

[newhoggy]

Plan to use these in cardano-cli here: https://github.com/input-output-hk/cardano-cli/pull/98/files#r1269392363

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