Support "Conjunction" (Java side)

Add support for "Conjunction", as defined in "Advanced Matching", ES 203 022, 5.3.1 (https://www.etsi.org/deliver/etsi_es/203000_203099/203022/01.04.01_60/es_203022v010401p.pdf#page=13)

conjunct "(" { (TemplateInstance | all from TemplateInstance)[","] } ")"

Main implementation tasks:

• parser/lexer
• semantic checks
• runtime and code generation