[code-reflection] Integrated: Hat add shade example

[Gary Frost]

Initial  example-shade project attempt.  Which can hopefully allow shader toy like playground using HAT.

At this point the code is just a copy of heal. With some uniform data structures in place. 

More to come.

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Commit messages:
 - Initial uniform data vec3,vec2,vec4,ivec2 and float buffered image experiments
 - Initial shade implementation (cloned heal)

Changes: https://git.openjdk.org/babylon/pull/885/files
  Webrev: https://webrevs.openjdk.org/?repo=babylon&pr=885&range=00
  Stats: 2150 lines in 26 files changed: 2119 ins; 24 del; 7 mod
  Patch: https://git.openjdk.org/babylon/pull/885.diff
  Fetch: git fetch https://git.openjdk.org/babylon.git pull/885/head:pull/885

PR: https://git.openjdk.org/babylon/pull/885