Include development effort estimation in RFF / YIP

Observation:
Currently there no development effort estimates includes in RFF / YIP which are subject to community votes.

Risk:
Due to the missing development effort estimation the community is not able to prioritize development tasks.
Example:
There might be RFF / YIP with low development effort and high positive impact and vice versa.

In addition this effort intransparency becomes a high risk for fraud in case the development tasks are financed with the community treasury. (ZERO TRUST)

Proposal:
Mandatory listing of expected development effort and high level task overview in each RFF / YIP
As well include an estimation confidence- and complexity-level in the evaluation.

Further discussion: Link these estimates to GitHub workflows.