[code-reflection] RFR: Structured type definition [v3]

[Paul Sandoz]

> Replace the currently implementation of `TypeDefinition` with a more general tree structure, which is the boundary between the runtime and serialized form.
> 
> This should help when/if we devise a richer modeling of Java types

Paul Sandoz has updated the pull request incrementally with one additional commit since the last revision:

  Method rename.

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

Changes:
  - all: https://git.openjdk.org/babylon/pull/23/files
  - new: https://git.openjdk.org/babylon/pull/23/files/b075c902..88982b77

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=babylon&pr=23&range=02
 - incr: https://webrevs.openjdk.org/?repo=babylon&pr=23&range=01-02

  Stats: 3 lines in 1 file changed: 0 ins; 0 del; 3 mod
  Patch: https://git.openjdk.org/babylon/pull/23.diff
  Fetch: git fetch https://git.openjdk.org/babylon.git pull/23/head:pull/23

PR: https://git.openjdk.org/babylon/pull/23