RFR: [type-classes] JDK-8377619: Consider OrderedNumerical interface

[Joe Darcy]

For consideration: a single interface to indicate both arithmetic and comparison operators are supported.

-------------

Commit messages:
 - JDK-8377619: Considered OrderedNumerical interface

Changes: https://git.openjdk.org/valhalla/pull/2077/files
  Webrev: https://webrevs.openjdk.org/?repo=valhalla&pr=2077&range=00
  Stats: 40 lines in 3 files changed: 36 ins; 2 del; 2 mod
  Patch: https://git.openjdk.org/valhalla/pull/2077.diff
  Fetch: git fetch https://git.openjdk.org/valhalla.git pull/2077/head:pull/2077

PR: https://git.openjdk.org/valhalla/pull/2077