Unify end and transition parameters

Signed-off-by: Tomas David [email protected]

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Please specify parts of this PR update:

• [x] Specification
• [ ] Schema
• [ ] Examples
• [ ] Extensions
• [ ] Roadmap
• [ ] Use Cases
• [ ] Community
• [ ] TCK
• [ ] Other

Discussion or Issue link:

What this PR does / why we need it:

End parameter could be boolean or object and transition parameter could be string or object. This PR unifies their definitions across the workflow states.

Special notes for reviewers:

Additional information:

@tomasdavidorg merged some of your other prs before this one ..need rebase, sry.

@tsurdilo I will open a new PR. Need to do some more fixes.

@tsurdilo please take a look https://github.com/serverlessworkflow/specification/pull/661