Implement addStrategyToQueue

[MickdeGraaf]

User Story

• As an <audience/user>: PieVault admin
• I want to <action/task>: add a strategy to the withdrawal queue
• so that <outcome/goal/benefit>: it can be used when an end user withdraws

Type

• Enhancement
• Maintenance
• Refactor

Description

Definition of Done

• Implement addStrategyToQueue
• Unit test addStrategyToQueue

Part of #30
See Yearn implementation