included source .proto files from ISIS, regenerated _pb2 files with p… (#211)

* included source .proto files from ISIS, regenerated _pb2 files with protoc

* numpy newbyteorder fix

* changelog entries

* test python 3.12 and 3.13, drop support/testing for 3.8

* setuptools depend to keep build-docs from failing

* remove python 3.13

* consolidate changelog entries