Print more/all ts/tc properties in R?

[gregorgorjanc]

In Python API we can query all properties of a ts and tc object.

In R API we only see what we call in print method, since we call C++/C code.

Should we then print discrete_time or discrete_genome properties, has ref seq, ...?

Also we have this comment in RcppTskit.cpp

// See tsk_treeseq_t inst/include/tskit/tskit/trees.h on what it contains. Here
// is Python summary
// https://tskit.dev/tskit/docs/stable/python-api.html#trees-and-tree-sequences
// See tsk_table_collection_t inst/include/tskit/tskit/tables.h on what it
// contains. Here is Python summary
// https://tskit.dev/tskit/docs/stable/python-api.html#sec-tables-api-table-collection