Rename `event::Version` to `Revision`

[50U10FCA7]

Synopsis

In future, when Aggregates will be added to arcane, it will be confusing to have two Versions:

• runtime (Version of the aggregate/Number of the event)
• const (Version of event revision)

Solution

• split es::Event into es::event::Event and es::event::Revisable
• provide es::event::Revision representing event's revision
• provide es::event::Static and es::event::Concrete as known versions of es::Event and es::event::Revisable
• merge es::event::Versioned macro into es::Event

Checklist

• Created PR:
  • [x] In draft mode
  • [x] Name contains issue reference
  • [x] Has type and k:: labels applied
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• Before review:
  • [x] Documentation is updated (if required)
  • [x] Tests are updated (if required)
  • [x] Changes conform code style
  • [x] CHANGELOG entry is added (if required)
  • [x] FCM (final commit message) is posted or updated
  • [x] Draft mode is removed
• [x] Review is completed and changes are approved
  • [x] FCM (final commit message) is approved
• Before merge:
  • [x] Milestone is set
  • [x] PR's name and description are correct and up-to-date
  • [x] All temporary labels are removed

[50U10FCA7]

FCM

Refactor events versioning into revisioning (#7)

- add `es::event::Static`, `es::event::Revisable`, `es::event::Concrete` traits
- abstract over revision type with `es::event::Revision` trait
- rename `es::event::codegen::has_different_types_with_same_name_and_ver` to `has_different_types_with_same_name_and_revision`
- remove `es::event::Versioned` trait
- merge `es::event::Versioned` macro into `es::event::Event` macro