Use annotations to identify when functions should be executed

[hugohills-regnosys]

Add annotations to cover the different supported phases:

• [translate] - using synonyms, e.g. FpML to CDM
• [enrich] - hook in enrichment functions to enrich CDM objects, e.g. enrich with reference data such as LEIs
• [transform] - using rules to transform CDM object into different CDM objects, e.g. in DRR, ReportableEvent is transformed into a EsmaEmirTradeTransactionReport
• [project] - hook in projection functions to project CDM objects into different formats, e.g. in DRR, EsmaEmirTradeTransactionReport can be projected into an ISO-20022 object (Rosetta type generated from the ISO-20022 xsd), and then serialised into xml