Ts types possible improvement

[caoshouse]

Added DICOM VRs in order to easily get/set Dataset Elements (including sequences)
For instance:
`
new Dataset({fakeProperty:'anyValue})
// throws a tsc error

const ds=new Dataset({})
ds.setElement('PatientName',1234)
// throws a tsc error

const ds=new Dataset({})
ds.setElement('PatientName','JOHN^DOE')
// it works

const ds=new Dataset({})
ds.getElement('ReferencedImageSequence').push({...blahblah})
// it works

`

[PantelisGeorgiadis]

Hello @caoshouse! Thank you for this PR!
I was wondering... is there any way to extract the datasetElements information from dcmjs's dictionary?
I'm not a huge fan of keeping the same (and large) information twice.

[caoshouse]

Hello @PantelisGeorgiadis
I just published a simple package here:
https://www.npmjs.com/package/@caoshouse/dcmjs-dictionary
It also generates a .d.ts file if needed

Anyway, I found the dictionary data here: dcmjs.data.DicomMetaDictionary.dictionary

[PantelisGeorgiadis]

Great work @caoshouse!
So, if I understand correctly, there is no way to generate and use the types dynamically, right? We need to somehow (re)include the dictionary.

[caoshouse]

Maybe I will have a solution to automatically update definition files by grabbing data from nema website.
Almost easy
Probably Next week