Phoenix editor - add type checking to symbol references

[joswig]

Checked for duplicates

Yes - I've already checked

Alternatives considered

Yes - and alternatives don't suffice

Related problems

No response

Describe the feature request

When authoring a sequence and passing a symbol (global, parameter, etc) to a command argument. Check for type mismatch and lint a warning when present. Some FSW implementations do coercion, and mismatch may not be a command error.