feat: Template improvements

Fixes: #183 (closed) , Related : #72

This update includes the first iteration of improvements of templates and most of these features are realised to support class definition:

• Specify the data type of property in the template
• Specify a set of validation rules for the types: String, Date, Number.
• Specify how many statements of a property can occur in resource created using the template.
• Specify if the template is strict, which means there is no possible way to add other properties to the resource created using the template.
• Support formatted labels for the resources where the label is not important (like blank nodes in RDF) and use predicate ids as placeholders in the formatted string.
• Specify the Order of properties.