Write Anonymisation implementation for FoDicom

[tznind]

@rkm did great work in setting up the C# anonymiser microservice that can wrap any anonymiser (with strategy pattern).

We need to add an implementation for FoDicom. There are 2 reasons to do this:

• So we can compare tag anonymisation performance with CTP
• Because DLS in HIC currently use FoDicom Anonymiser and want to preserve functionality

[tznind]

I have started working towards this by making FoDicomAnonymiser RDMP pipeline component more reusable. PR is a work in progress here SMI/RdmpDicom#262

HIC DLS are requesting multiple new features for easy control of anonymisation process e.g.:

• Support for DeleteTags handling subtags RdmpDicom#260
• Option to remove private tags even when 'Skip Anonymisation For SRs' is set RdmpDicom#261
• Support for encrypted archives RdmpDicom#206

And I really don't want to get into having to implement this in 2 places