Added constat expression solving

examples/globExpr.dusk

include/dusk/AST/ASTNode.h

include/dusk/AST/ASTVisitor.h

include/dusk/AST/Decl.h

include/dusk/AST/DiagnosticsParse.h

include/dusk/AST/Expr.h

include/dusk/AST/Pattern.h

include/dusk/AST/Scope.h

include/dusk/AST/Stmt.h

include/dusk/AST/Type.h

include/dusk/AST/TypeRepr.h

lib/AST/ASTContext.cpp

lib/AST/ASTNode.cpp

lib/AST/ASTPrinter.cpp

lib/AST/ASTWalker.cpp

lib/AST/Decl.cpp

lib/AST/Expr.cpp

lib/AST/Pattern.cpp

lib/AST/Scope.cpp

lib/AST/Stmt.cpp