Emissions Reduction/Removals (ERRs)Calculation Pre-Calculator in Guardian

### Problem description
When project developers and/or other policy users follow the workflow submitting data in forms etc they currently have no way to foresee what effect the data they input would have or results they'd produce. I.e. there is no way for them to 'trial-run' individual steps or the entire policy with project data and to see, for example, the resulting calculations of estimated ERRs.

### Requirements
Introduce the capability for users to 'trial-run' any policy steps when following the policy workflow such that:

- users can input their data in forms and advance to the next step without affecting Hedera ledger, IPFS or any other externals systems (i.e. no documents get published externally)
- users can see the "trial" results of the performed step
- after such "trial" advancements "to the next step" users can either:
- navigate back to the original view, with all data they have inputted still present in the form
- make the trial data and the associate step 'actual', i.e. performed 'for real' with the effects published externally as per the usual (non-trial) mode of operation.

### Definition of done

- Functionality is implemented as per the specification above
- New capability is documented

### Acceptance criteria

- ERR calculation should be consistent with defined formula by the methodology/registry from baseline through issuance.
- ERR calculation should be visible in the Guardian in real time based on input data by all parties