Read only workflow worker

[kkcmadhu]

Is your feature request related to a problem? Please describe.
There are times when i want my sysetm not to process workflows/signals (say during maintenance period)
However, i would like workflow queries to still be processed during this maintenace period

Describe the solution you'd like
I am thinking of a read only worker which can process /respond to queryes but will not process activity/siginals/workflows.

Describe alternatives you've considered
Custom code, in my workflow , keeping all workflows in a timer event usin workflow.await()

I had some queries regarding this in community and @mfateev advised to raise a Feature Request.
https://community.temporal.io/t/read-only-workflow-worker/6635