State only modifies Context#state - prep for Map/Parallel

[kbrock]

In prep for Map, have State only modify its own data in Context. (Followup will pass context into State methods, so the caller (i.e.: Map, Parallel, or Workspace) will determine the context and act accordingly.

1. Don't modify the context in Workflow.new - instead modify it in the first step.
2. State#start only modifies Context#state and not Context#execute - instead Workflow is responsible for execute.
3. State#finish only modified Context#state and not Context#execute - instead Workflow is responsible for that.

[kbrock]

update:

• fixed cops
• added comment
• indentation

[kbrock]

update:

• created method for start_workflow
• moved start_workflow out of current_state - this caused a lot of spec churn

update:

• oops, added end_workflow
• cops

[miq-bot]

Checked commits https://github.com/kbrock/floe/compare/f5cc75e628a0ce5e00dcb8a35687d255f5ba1ae1~...6db3e5953f8fd1bc02a01cee0a3194a889425aa9 with ruby 2.7.8, rubocop 1.56.3, haml-lint 0.51.0, and yamllint 11 files checked, 0 offenses detected Everything looks fine. :cookie:

[kbrock]

@agrare looking forward to seeing #208 leveraging this