enh: Add param.AutoName

[hoxbro]

Currently, it is just a proof of concept to see if it is possible to add an autoincrement variable name based on the created class.

import param class T(param.Parameterized): ... class S(param.Parameterized): ... print(T().name) print(T().name) print(S().name) print(S.name)

❯ python example.py T00000 T00001 S00002 S