Extend PyEnzyme to include stock solutions

[JR-1991]

PyEnzyme should support managing stock solutions and their respective volumes that are added to individual measurements. Right now PyEnzyme just accepts concentrations that are not related to the species itself, when added to a measurement. However, it is common lab practice to withdraw species from a stock solution and add it to the reaction vessel.

PyEnzyme should be as close as possible to the everyday practice, which could be met by the following proposal:

• Introduce a new Stock solution class, which defines concentration, vendors etc for a species
• Allow users to specify volumes that have been drawn from the stock and added to the reaction vessel
• Use the stock solution's concentration and vessel volume to re-calculate the concentration or amount

**ToDo's***

• [ ] Design StockSolution class
• [ ] Extend Measurement class
• [ ] Integrate into the SBML model

[github-actions[bot]]

This issue is stale because it has been open for 30 days with no activity.

[github-actions[bot]]

This issue is stale because it has been open for 30 days with no activity.

[github-actions[bot]]

This issue was closed because it has been inactive for 14 days since being marked as stale.