Sync numerous updates from older repo

[markwaddle]

So the team can switch to the new public repo and everyone can benefit

• renames scripts to use hyphens, ex: node-engine-service, instead of
  underscores (more conventional)
• renames command-line arguments to use hyphens, ex: --log-level,
  instead of underscores (more conventional)
• various README updates for the above
• adds colorized logging for nodeengine using rich package
• adds pytest optional dependency
• adds launch configuration for "Node Engine Service", which was
  mentioned in the docs and is generally helpful
• adds pylance settings to format, check types, fix on save
• enables stream_log on simple-chat-client flows so you can see the logs
  with debug-service.py
• introduces FlowExecutor protocol
• flows run flows in-process by default now, instead of making network
  calls back to the http service
• remote clients, such as apps, can use the NodeEngineClient
• moved SSE connection management to the service instead of the runtime
• added ability for executing Runtime in process, and add event
  consumers
• service registers each SSE connection as an event consumer
• fixed the notebooks so they both run and display reasonable outputs
• removed need to have "examples" package, to avoid name collisions with
  such a generic name
• adds debug_information collection by default to error that results
  from flow execution
• adds support for loading installed module components by qualified module names
• avoids infinite loop in moduleloader

[dluc]

🚀 thanks!