Port table tut material into data_structures

Author: hyanwong

_config.yml

@@ -33,6 +33,7 @@ sphinx:
         tskit: ["https://tskit.dev/tskit/docs/stable", null]
         msprime: ["https://tskit.dev/msprime/docs/stable", null]
         pyslim: ["https://pyslim.readthedocs.io/en/stable", null]
+        numpy: ["https://numpy.org/doc/stable/", null]
       myst_enable_extensions:
       - colon_fence
       - deflist