New metrics to add and compute to the Metrics object

[jonquet]

Similar to #102 , we also need to add a few metrics to the Metrics object:

• Number of object properties => mod:numberOfObjectProperties
• Number of data properties => mod:numberOfDataProperties
• Number of labels => mod:numberOfLabels
• Number of deprecated objects => mod:numberOfDeprecated
• Byte size => dcat:byteSize
• Number of classes with no "formal" definition => mod:classesWithNoFormalDefinition
• Number of classes with no label => mod:classesWithNoLabel
• Number of classes with no author metadata => mod:classesWithNoAuthorMetadata
• Number of classes with no date metadata => mod:classesWithNoDateMetadata
• Number of notes or comments => mod:numberOfNotes
• Number of using projects => mod:numberOfUsingProjects
• Number of endorsements => mod:numberOfEnsorments
• Number of evaluations => mod:numberOfEvaluations
• FAIR score => mod:FairScore

See MOD3.0 for details:
https://docs.google.com/spreadsheets/d/1APdKgSCFKlM8Wxi4WCl_weaiU7x3I-xW6cgg-RS3_zw/edit#gid=1638855124

[jonquet]

Then we need to populate them with multiple approaches :

With a script checking O'FAIRe value
At parsing time as other metrics
Incremeting the value when related property is updated

[imadbourouche]

Add these attributes here:

• check Feature: add metrics in artefacts distributions #194, in the file metric.rb
• add logic to calculate these metrics