[Feature] Provide "edit" asset function

[moritzkirstein]

Motivation / Problem

Current state "Publishing":

classDiagram
    note for DDO "ocean.js spec DDO"
    AssetBuilder *-- NautilusAsset
    NautilusAsset *-- NautilusDDO
    NautilusDDO *-- DDO
    class NautilusAsset{
        +NautilusDDO nautilusDDO
    }
    class AssetBuilder{
        +NautilusAsset nautilusAsset
    }
    class NautilusDDO{
        +DDO ddo
    }
    class DDO{
        +object metadata
        +service[] services
    }

We want to be able to reuse publishing for editing functionality.

Solution

• [x] Create constructors to allow pre-loading the DDO object of NautilusDDO with aquarius metadata
  • [x] NautilusDDO: static createFromDDO(ddo: DDO)
  • [x] NautilusAsset
  • [x] AssetBuilder
• [x] Helper function to create NautilusDDO / NautilusAsset from a given did
• [x] New Nautilus.edit() function that re-uses the existing publishing flow
  • [x] optional: if service changes, we need a new function to edit services (research ocean specs)
  • [x] optional: if new services, see Step 2. createDatatokenAndPricing
  • [x] always: see Step 3. getDDO and publishDDO
• [x] Tests if edits / updates are overwritten (applied) correctly
  • [x] Metadata changes
  • [x] Service changes
  • [x] ...
  • [ ] confirm test-edits with asset queries (hard because of aquarius delay, maybe we can trigger caching, see: https://docs.oceanprotocol.com/developers/aquarius/asset-requests#trigger-caching)