What problem does this PR solve?

Split out Molecule generated types while providing no-std support to ckb-std, replacing crates ckb-standalone-types.

What is changed and how it works?

• Separated generated types from ckb-types, named as ckb-gen-types.
• ckb-types re-exports ckb-gen-types to ensure compatibility with other crates that reference it.
• ckb-gen-types comes with no-std support and can fully replace ckb-standalone-types, which ckb-std relies on.
• The basic principles of extracting conversions and extensions in ckb-gen-types are as follows:
  • If the conversion or extension involves std types, it will be kept in ckb-gen-types and conditionally compiled with the "std" feature.
  • If the conversion or extension involves types from third-party crates, it will also remain in ckb-gen-types.
  • If the conversion or extension involves types from ckb-types::core, it will be kept in ckb-types, and a custom trait will be placed in the prelude to address orphan rules.
• ckb-gen-types adds feature controls to several sub-modules in the extension, following the approach used in ckb-standalone-types to be compatible with ckb-std:
  • calc-hash: no-std
  • check-data: no-std
  • serialized-size: no-std
  • std: default, enables all in the std environment.
• A feature, ckb-contract, has been added to ckb-hash to support compatibility with ckb-std and allow specifying the use of blake2b-ref, following the approach used in ckb-standalone-types.
• Made some trade-offs in ckb-gen-types (perhaps a better approach could be considered):
  • To maintain compatibility with ckb-std, core::ScriptTypeHash have been kept in ckb-gen-types.

What's Changed:

Related changes

• ckb-std update for test ckb-gen-types: https://github.com/EthanYuan/ckb-std/tree/update
• ckb-x64-simulator (ckb-std's dep) update for test: https://github.com/EthanYuan/ckb-x64-simulator/tree/update

Check List

Tests

• Unit test
• Integration test
• Manual test (add detailed scripts or steps below)
  • After replacing ckb-standalone-types with ckb-gen-types, ckb-std passes the tests successfully.
• No code ci-runs-only: [ quick_checks,linters ]

Side effects

• Performance regression
• Breaking backward compatibility

Release note

Title Only: Include only the PR title in the release note.