Clarify the requirements of stock assessment

[Rindrics]

• "Projection results based on the assessment seems good"
• Assessment results is not so much different from previous assessment results

Break these requirements down

[Rindrics]

• project() should receive MSY estimation results
• "good":
  • SSB exceeds target reference point

[Rindrics]

assess() should return

• catch
• SSB
• Biomass

[Rindrics]

Assessment results is not so much different from previous assessment

Where does the "previous assessment results" come from?